Performance-aware system and method for adaptable service mesh data plane

ABSTRACT

A method, configuration controller, computer program, and computer program product are provided. Determining whether or not a configuration change in a service mesh data plane is needed is based on at least one parameter. Responsive to determining that the configuration change is needed, a set of possible configuration changes is identified. A configuration based on the set of possible configuration changes is generated. The configuration is applied to the service mesh data plane.

TECHNICAL FIELD

The present disclosure relates generally to communications, and more particularly to communication methods and related devices and nodes supporting wireless communications.

BACKGROUND

A service mesh constitutes a configurable communication platform that allows controlled service exposure by taking care of granular security management, progressive service delivery, dynamic traffic routing, resilient communication and consistent observability. A generic service mesh platform can be realized as a dedicated infrastructure layer. The platform consists of a control plane and a data plane as illustrated in FIG. 1 . The control plane manages and configures the components of the data plane for traffic management, security communication and telemetry collection.

The data plane is composed of a set of proxies deployed together with the microservice instances. These proxies are in charge of mediating and controlling communication between microservices, either inside the same service mesh instance or between different service mesh instances. Proxies are involved in service discovery, health checking, traffic routing, load balancing, authentication/authorization and observability.

Most of the current service mesh implementations are focused on cloud base implementations such as central cloud implementations, except for Istio, a L4/L7 service mesh, which has recently started to address challenges related to multi-cluster, multi-mesh scenarios. Istio is considering different control plane models for service meshes that can span among multiple clusters and multiple networks, as well as providing some support among multiple service mesh instances. As a result, Istio supports different network setups, which are:

-   -   Single network setup: In this case, services that are part of         the mesh(es) share a flat network via direct access over a VPN         (virtual private network). Here, all service instances can reach         each other directly via sidecar-proxy to sidecar-proxy         communication.     -   Multi-network setup: Service-to-service communication is enabled         by using ingress/egress Gateways, which are standalone proxies.         Partitioned service discovery can be used to provide service         consumers a different view of the service endpoints based on the         level of information that can be shared.

Service mesh configuration is usually policy-based. In the case of Istio, all architectural components are involved in one way or another with the policy-based configuration of the service mesh. Istio supports different kinds of policies based on the capabilities the service mesh has. The policies include: Traffic management policies, authentication policies, authorization policies, audit (telemetry) policies and service discovery policies.

Istio has several components that can be useful. Galley is a component allows validation, ingestion, processing and distribution of configuration policies. Pilot is a component that watches the configuration storage, translates high-level policies into component-level policies in a platform agnostic way, and propagates them to the sidecar proxies during runtime upon configuration update. In terms of policy enforcement, the proxies enforce fine-grained traffic control as well as access control and rate limiting. The Citadel component can be used to enforce security policies based on service identity.

The service mesh may offer a great level of flexibility for its configuration thanks to the data plane components of the service mesh. However, this level of flexibility comes at a cost. For example; standard service meshes usually penalize the communication performance in terms of added latencies, since side-car proxies are used even for communication between services in the same node. To enhance the service mesh performance, some have suggested proxy-less approaches by removing unnecessary components in the data plane and replacing them with other communication means.

One example of this strategy of removing components is AppSwitch, which is a plugin that can be integrated with e.g. Istio. AppSwitch sidesteps intermediate communication layers and invokes the proxy only when the proxy is needed. This plugin intercepts application's network events at the system call interface level (before they get to the TCP/IP stack of the host). In some cases, this allows a network to enforce policies without the need for vSwitches or IPtables.

SUMMARY

The service mesh offers great flexibility regarding policy management across the mesh with fine level of granularity. In a standard service mesh, a proxy is injected for each and every micro-service part of the mesh, regardless of the application requirements. This injection strategy is what allows having a very detailed control over the desired behavior of the communication path. However, this level of granularity comes at a cost. During service-to-service communication, the injected side-car proxies represent extra hops in the data path thus introducing extra delays that increase the end-to-end latency.

Usually, applications that are hosted in more central sites of the cloud do not have very stringent demands regarding latency. For these cases, the conventional sidecar-based approach works well. However, in the edge cloud, the situation is different. For applications that need to be hosted at the edge cloud such as XR (extended reality) gaming, the expected quality of service and user experience are quite demanding.

Therefore, the applicability of service mesh technologies in the edge cloud is not straight forward. Here, there is a need of having a solution that addresses this challenge or trade-off between the level of granularity for policy control and enforcement versus the performance overhead added by the sidecar proxies, based on the application requirements.

According to some embodiments of inventive concepts, a method is provided performed by a configuration controller in a network. The method includes determining whether or not a configuration change in a service mesh data plane is needed based on at least one parameter. The method further includes responsive to determining that the configuration change is needed, identifying a set of possible configuration changes. The method further includes generating a configuration based on the set of possible configuration changes. The method further includes applying the configuration to the service mesh data plane.

An advantage of the inventive concepts that can be achieved is addressing the trade-off between configuration granularity vs performance overhead in an automated and dynamic way. The inventive concepts makes service meshes more performance-aware to enable their applicability to edge systems even for highly demanding applications by dynamically reconfiguring the service mesh data plane as to meet application requirements.

According to other embodiments of inventive concepts, a configuration controller in a network includes processing circuitry and memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations including determining whether or not a configuration change in a service mesh data plane is needed based on at least one parameter. The operations further include responsive to determining that the configuration change is needed, identifying a set of possible configuration changes. The operations further include generating a configuration based on the set of possible configuration changes. The operations further include applying the configuration to the service mesh data plane.

Configuration controllers and computer program products having analogous operations are also provided.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate certain non-limiting embodiments of inventive concepts. In the drawings:

FIG. 1 is a block diagram illustrating a generic service mesh according to some embodiments;

FIG. 2 is a block diagram illustrating a wireless communication device according to some embodiments of inventive concepts;

FIG. 3 is a block diagram illustrating a radio access network RAN node (e.g., a base station eNB/gNB) according to some embodiments of inventive concepts;

FIG. 4 is a block diagram illustrating a core network CN node (e.g., an AMF node, an SMF node, etc.) according to some embodiments of inventive concepts;

FIG. 5 is a block diagram illustrating an edge network node according to some embodiments of inventive concepts;

FIG. 6 is a block diagram illustrating an example of a distributed system overview of a system in which a configuration controller can be used according to some embodiments of inventive concepts;

FIG. 7 is a block diagram illustrating components of a configuration controller according to some embodiments of inventive concepts;

FIG. 8 is a flow chart illustrating operations of a configuration controller according to various embodiments of inventive concepts;

FIG. 9 is a block diagram illustrating another example of a distributed system overview of a system in which a configuration controller can be used according to some embodiments of inventive concepts;

FIGS. 10-15 are flow chart illustrating operations of a configuration controller according to various embodiments of inventive concepts;

FIG. 16 is a block diagram illustrating an example of operations of a configuration controller according to some embodiments of inventive concepts;

FIG. 17 is a block diagram of a wireless network in accordance with some embodiments;

FIG. 18 is a block diagram of a user equipment in accordance with some embodiments

FIG. 19 is a block diagram of a virtualization environment in accordance with some embodiments;

FIG. 20 is a block diagram of a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments;

FIG. 21 is a block diagram of a host computer communicating via a base station with a user equipment over a partially wireless connection in accordance with some embodiments;

FIG. 22 is a block diagram of methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments;

FIG. 23 is a block diagram of methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments;

FIG. 24 is a block diagram of methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments; and

FIG. 25 is a block diagram of methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments.

DETAILED DESCRIPTION

Inventive concepts will now be described more fully hereinafter with reference to the accompanying drawings, in which examples of embodiments of inventive concepts are shown. Inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of present inventive concepts to those skilled in the art. It should also be noted that these embodiments are not mutually exclusive. Components from one embodiment may be tacitly assumed to be present/used in another embodiment.

The following description presents various embodiments of the disclosed subject matter. These embodiments are presented as teaching examples and are not to be construed as limiting the scope of the disclosed subject matter. For example, certain details of the described embodiments may be modified, omitted, or expanded upon without departing from the scope of the described subject matter.

FIG. 2 is a block diagram illustrating elements of a communication device UE 200 (also referred to as a mobile terminal, a mobile communication terminal, a wireless device, a wireless communication device, a wireless terminal, mobile device, a wireless communication terminal, user equipment, UE, a user equipment node/terminal/device, etc.) configured to provide wireless communication according to embodiments of inventive concepts. (Communication device 200 may be provided, for example, as discussed below with respect to wireless device 4110 of FIG. 17 , UE 4200 of FIG. 18 , UEs 4491, 4492 of FIG. 20 , and UE 4530 of FIG. 21 , all of which should be considered interchangeable in the examples and embodiments described herein and be within the intended scope of this disclosure, unless otherwise noted.) As shown, communication device UE may include an antenna 207 (e.g., corresponding to antenna 4111 of FIG. 17 ), and transceiver circuitry 201 (also referred to as a transceiver, e.g., corresponding to interface 4114 of FIG. 17 , interfaces 4205, 4209, 4211, transmitter 4233 and receiver 4235 of FIG. 18 , and radio interface 4537 of FIG. 21 ) including a transmitter and a receiver configured to provide uplink and downlink radio communications with a base station(s) (e.g., corresponding to network node 4160 of FIG. 17 , also referred to as a RAN node, and base station 4520 of FIG. 21 ) of a radio access network. Communication device UE may also include processing circuitry 203 (also referred to as a processor, e.g., corresponding to processing circuitry 4120 of FIG. 17 , processor 4201 of FIG. 18 , and processing circuitry 4538 of FIG. 21 ) coupled to the transceiver circuitry, and memory circuitry 205 (also referred to as memory, e.g., corresponding to device readable medium 4130 of FIG. 17 and memory 4215 of FIG. 18 ) coupled to the processing circuitry. The memory circuitry 205 may include computer readable program code that when executed by the processing circuitry 203 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 203 may be defined to include memory so that separate memory circuitry is not required. Communication device UE may also include an interface (such as a user interface) coupled with processing circuitry 203, and/or communication device UE may be incorporated in a vehicle.

As discussed herein, operations of communication device UE may be performed by processing circuitry 203 and/or transceiver circuitry 201. For example, processing circuitry 203 may control transceiver circuitry 201 to transmit communications through transceiver circuitry 201 over a radio interface to a radio access network node (also referred to as a base station) and/or to receive communications through transceiver circuitry 301 from a RAN node over a radio interface. Moreover, modules may be stored in memory circuitry 305, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 203, processing circuitry 203 performs respective operations (e.g., operations discussed below with respect to Example Embodiments relating to wireless communication devices). According to some embodiments, a communication device UE 200 and/or an element(s)/function(s) thereof may be embodied as a virtual node/nodes and/or a virtual machine/machines.

FIG. 3 is a block diagram illustrating elements of a radio access network RAN node 300 (also referred to as a network node, base station, eNodeB/eNB, gNodeB/gNB, etc.) of a Radio Access Network (RAN) configured to provide cellular communication according to embodiments of inventive concepts. (RAN node 300 may be provided, for example, as discussed below with respect to network node 4160 of FIG. 17 , base stations 4412 a, 4412 b, and 4412 c of FIG. 20 and/or base station 4520 of FIG. 21 .) As shown, the RAN node may include transceiver circuitry 301 (also referred to as a transceiver, e.g., corresponding to portions of interface 4190 of FIG. 17 and/or portions of radio interface 4527 of FIG. 21 ) including a transmitter and a receiver configured to provide uplink and downlink radio communications with mobile terminals. The RAN node may include network interface circuitry 307 (also referred to as a network interface, e.g., corresponding to portions of interface 4190 of FIG. 17 and portions of communication interface 4526 of FIG. 21 ) configured to provide communications with other nodes (e.g., with other base stations) of the RAN and/or core network CN. The network node may also include processing circuitry 303 (also referred to as a processor, e.g., corresponding to processing circuitry 4170 of FIG. 17 or processing circuitry 4528 of FIG. 21 ) coupled to the transceiver circuitry, and memory circuitry 305 (also referred to as memory, e.g., corresponding to device readable medium 4180 of FIG. 17 ) coupled to the processing circuitry. The memory circuitry 305 may include computer readable program code that when executed by the processing circuitry 303 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 303 may be defined to include memory so that a separate memory circuitry is not required.

As discussed herein, operations of the RAN node may be performed by processing circuitry 303, network interface 307, and/or transceiver 301. For example, processing circuitry 303 may control transceiver 301 to transmit downlink communications through transceiver 301 over a radio interface to one or more mobile terminals UEs and/or to receive uplink communications through transceiver 301 from one or more mobile terminals UEs over a radio interface. Similarly, processing circuitry 303 may control network interface 307 to transmit communications through network interface 307 to one or more other network nodes and/or to receive communications through network interface from one or more other network nodes. Moreover, modules may be stored in memory 305, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 303, processing circuitry 303 performs respective operations (e.g., operations discussed below with respect to Example Embodiments relating to RAN nodes). According to some embodiments, RAN node 400 and/or an element(s)/function(s) thereof may be embodied as a virtual node/nodes and/or a virtual machine/machines.

According to some other embodiments, a network node may be implemented as a core network CN node without a transceiver. In such embodiments, transmission to a wireless communication device UE may be initiated by the network node so that transmission to the wireless communication device UE is provided through a network node including a transceiver (e.g., through a base station or RAN node). According to embodiments where the network node is a RAN node including a transceiver, initiating transmission may include transmitting through the transceiver.

FIG. 4 is a block diagram illustrating elements of a core network CN node 400 (e.g., an SMF node, an AMF node, etc.) of a communication network configured to provide cellular communication according to embodiments of inventive concepts. As shown, the CN node may include network interface circuitry 407 (also referred to as a network interface) configured to provide communications with other nodes of the core network and/or the radio access network RAN. The CN node may also include a processing circuitry 403 (also referred to as a processor) coupled to the network interface circuitry, and memory circuitry 405 (also referred to as memory) coupled to the processing circuitry. The memory circuitry 405 may include computer readable program code that when executed by the processing circuitry 403 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 403 may be defined to include memory so that a separate memory circuitry is not required.

As discussed herein, operations of the network node may be performed by processing circuitry 403 and/or network interface circuitry 407. For example, processing circuitry 403 may control network interface circuitry 407 to transmit communications through network interface circuitry 407 to one or more other network nodes and/or to receive communications through network interface circuitry from one or more other network nodes. Moreover, modules may be stored in memory 405, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 403, processing circuitry 403 performs respective operations (e.g., operations discussed below with respect to Example Embodiments relating to core network nodes). According to some embodiments, network node 400 and/or an element(s)/function(s) thereof may be embodied as a virtual node/nodes and/or a virtual machine/machines.

FIG. 5 is a block diagram illustrating elements of an edge node 500 (also referred to as a network node, base station, eNodeB/eNB, gNodeB/gNB, etc.) of a Radio Access Network (RAN) configured to provide cellular communication according to embodiments of inventive concepts. (Edge node 500 may be provided, for example, as discussed below with respect to network node 4160 of FIG. 17 , base stations 4412 a, 4412 b, and 4412 c of FIG. 20 and/or base station 4520 of FIG. 21 .) As shown, the edge node may include transceiver circuitry 501 (also referred to as a transceiver, e.g., corresponding to portions of interface 4190 of FIG. 17 and/or portions of radio interface 4527) including a transmitter and a receiver configured to provide uplink and downlink radio communications with mobile terminals. The edge node may include network interface circuitry 507 (also referred to as a network interface, e.g., corresponding to portions of interface 4190 of FIG. 17 and portions of communication interface 4526) configured to provide communications with other nodes (e.g., with other base stations) of the RAN and/or core network CN. The edge node may also include processing circuitry 503 (also referred to as a processor, e.g., corresponding to processing circuitry 4170) coupled to the transceiver circuitry, and memory circuitry 505 (also referred to as memory, e.g., corresponding to device readable medium 4180 of FIG. 17 ) coupled to the processing circuitry. The memory circuitry 505 may include computer readable program code that when executed by the processing circuitry 503 causes the processing circuitry to perform operations according to embodiments disclosed herein. According to other embodiments, processing circuitry 503 may be defined to include memory so that a separate memory circuitry is not required.

As discussed herein, operations of the edge node may be performed by processing circuitry 503, network interface 507, and/or transceiver 501. For example, processing circuitry 503 may control transceiver 501 to transmit downlink communications through transceiver 501 over a radio interface to one or more mobile terminals UEs and/or to receive uplink communications through transceiver 501 from one or more mobile terminals UEs over a radio interface. Similarly, processing circuitry 503 may control network interface 507 to transmit communications through network interface 507 to one or more other network nodes and/or to receive communications through network interface from one or more other network nodes. Moreover, modules may be stored in memory 505, and these modules may provide instructions so that when instructions of a module are executed by processing circuitry 503, processing circuitry 503 performs respective operations (e.g., operations discussed below with respect to Example Embodiments relating to network nodes). According to some embodiments, edge node 500 and/or an element(s)/function(s) thereof may be embodied as a virtual node/nodes and/or a virtual machine/machines.

As previously indicated, a service mesh offers great flexibility regarding policy management across the service mesh with fine level of granularity. In a standard service mesh, a proxy is injected for each and every micro-service part of the service mesh, regardless of the application requirements. This injection strategy allows having a very detailed control over the desired behavior of the communication path. However, this level of granularity comes at a cost. During service-to-service communication, the injected side-car proxies represent extra hops in the data path thus introducing extra delays that increase the end-to-end latency.

Usually, applications that are hosted in more central sites of the cloud do not have very stringent demands regarding latency. For these cases, the conventional sidecar-based approach usually works well. However, in edge cloud the situation is different. For applications that need to be hosted at the edge such as XR gaming, the expected quality of service and user experience are quite demanding.

Thus, the applicability of service mesh technologies in the edge cloud is not straight forward. Various embodiments of inventive concepts may provide this challenge or trade-off between the level of granularity for policy control and enforcement versus the performance overhead added by the sidecar proxies, based on the application requirements.

Various embodiments of inventive concepts provide a configuration controller to handle the trade-off between the level of granularity for policy control and enforcement vs the performance overhead in the communication data path. The configuration controller can decide an appropriate configuration for the components of the service mesh data plane and dynamically adapt the configuration (even during application execution if needed) as to meet application requirements.

The configuration controller takes as input the description of the distributed system and its status in real-time. Tables 1, 2, and 3 illustrate how a cluster description, node description, and link description can be defined for a cloud infrastructure.

TABLE 1 Cluster Description IdName Network Nodes Links ResourceCapacity . . . cluster1 network5 {node3, {link1, {vCPU: 250, node7, . . .} link2, . . .} memory: 100 GB, storage: 50 TB} . . .

TABLE 2 Node description IdName ResourceCapacity . . . node 1 {vCPU: 24, memory: 2 GB, storage: 5 GB, . . .} . . .

TABLE 3 Link description IDName Components EstimatedPerformance . . . link 1 {cluster1, {delay: 200 ms, bitrate: node, . . .} 100 MB/s, . . .} . . .

Tables 4-7 illustrate how an application description, microservice set description, microservice description, and request chain description can be defined for a cloud-based application.

TABLE 4 Application description IDName Components RequestChains . . . app1 {uSSet1, {chain1, uS8, . . .} chain7, . . .} . . .

TABLE 5 Microservice set description IDName Components . . . uSSet4 {uS3, uSSet1, . . .} . . .

TABLE 6 Microservice description IDName Dependencies ResourceRequirements . . . uS1 {uS3, {vCPU: 16, uSSet4, . . .} memory: 5 GB, storage: 50 GB, . . .} . . .

TABLE 7 Request chain description IDName Components PerformanceRequirements . . . chain1 {uSSet1, {latency Requirement: uS2, uS3 . . .} 100 ms, bandwidthRequirement: 50 MB/s, . . .} . . .

The configuration controller may also require description of the application such as dependencies, requirements and the application's real-time status. Furthermore, the configuration controller also considers a range indicating the minimum and/or maximum level of granularity desired for policy control and enforcement.

The configuration controller generates as output an appropriate configuration template for the service mesh data plane reconfiguration, i.e. a set of selected ingress/egress gateways and/or side-car proxies including how they are associated to the different elements of the distributed system together with adapted component-level policies for these data plane components.

Based on the input, the configuration controller may analyze and identify when the configuration must be adapted. To do so, the configuration controller executes the following functions with help of the service mesh:

-   -   Placement strategy of ingress/egress gateway and side-car         proxies     -   Selection strategy of an appropriate gateway/proxy, e.g.         latency-optimized proxy     -   Appropriate component-level policy transformation based on the         placement or selection strategy     -   Injection and/or ejection of proxies with appropriate policy         configuration

High-level components that are part of an example system where the configuration controller can operate are depicted in FIG. 6 . The distributed system under consideration comprises the following elements: one or more service meshes, one or more network domains, one or more clusters, one or more cluster nodes, one or more applications each of which are composed by one or more micro-services. FIG. 6 only illustrates one of many possible element combinations of the distributed system. Focusing on the configuration of the service mesh, the service mesh's data plane can contain a set of ingress gateways, egress gateways and/or side-car proxies.

A block diagram of the functional architecture of an embodiment of a configuration controller is illustrated in FIG. 7 . During application instantiation or even during application runtime, the configuration controller 700 analyzes and identifies when the configuration of the service mesh data plane must be adapted.

The request chain configuration optimizer 702 includes a proxy selection function 704 and a proxy placement function 706. The proxy selection function 704 is used by the configuration controller 700 to analyze the given input to determine an appropriate selection strategy for the data plane components of the service mesh. The selection strategy identifies the type of proxy or gateway to be used (e.g., generic L4/L7 proxy, performance-optimized proxy, geography-optimized proxy, etc.), or any other communication means (e.g. system-call-based protocol when appropriate). Table 8 illustrates an example of a description of available proxy profiles.

TABLE 8 Description of available proxy profiles IDName Type CommunicationMode EstimatedPerformance . . . envoy_proxy {default_sidecar, {gRPC, TCP, HTTP, . . .} {extra_delay: 2.76 ms, default_ingress, cpu_usage: 0.5 vCPU, default_egress, . . .} memory_usage: 50 MB, . . .} app_switch {latency_optimized, . . .} {system_call, . . .} {extra_delay: 0.3 ms, cpu_usage: 0.25 vCPU, memory_usage: 10 MB, . . .} . . .

The proxy placement function 706 is used by the configuration controller 700 to analyze the input that the configuration controller 700 has received and based on that, proxy placement function 706 generates an appropriate placement strategy for the service mesh data plane components. The placement strategy may include a set of ingress/egress gateways and/or side-car proxies associated to the different elements of the distributed system (e.g. if there is a side-car proxy per cluster node, for a set of specific micro-services or per each and every micro-service). The configuration controller 700 may use other function(s) 708 in optimizing the request chain configuration.

Table 9 illustrates an example of a description of service instance placement strategy. The service instance placement strategy indicates where service instances are to be placed.

TABLE 9 Description of service instance placement strategy IDServiceInstance RegionAfinity ClusterAfinity NodeAfinity . . . uS7_r1 AZ_US Cluster3 Node3 . . .

The proxy configuration generator 710 includes a policy conversion function 712 and a configuration generation function 714. Based on the placement and selection strategies and the current component-level policies being enforced by the data plane components, the policy conversion function 712 is used by the configuration controller 700 to translate these policies to the proper level of granularity desired for the reconfiguration in such a way that the planned data plane components can still understand the policies that need to be enforced. Table illustrates an example of a high-level configuration policy.

TABLE 10 Example of high-level configuration policy apiVersion: networking.istio.io/v1beta1 kind: DestinationRule metadata:  name: reviews-cb-policy spec:  host: reviews.prod.svc.cluster.local  trafficPolicy:   connectionPool:    tcp:     maxConnections: 100    http:     http2MaxRequests: 1000     max RequestsPerConnection: 10   outlierDetection:    consecutiveErrors: 7    interval: 5m    baseEjectionTime: 15m

The configuration generation function 714 is used by the configuration controller 700 to generate, based on the placement strategy, the selection strategy and the converted policies, appropriate configuration templates 716.

The gradual configuration applier 718 includes a proxy injection function 720 and a policy control function 722. The proxy injection function 720, based on the configuration templates 716, reconfigures the data plane by injecting/ejecting data plane components. The policy control function 722, based on the configuration templates, reconfigures the data plane components with the proper policies so that the polices can be properly enforced. Table 11 illustrates an example of a description of policy-based configuration types associated to the proxies and Table 12 illustrates an example of a definition of possible policy-granularity levels associated to the proxies. Policy granularity concerns the representation and operation of policies on different levels of detail based on the different hierarchies of association between hardware/software components comprising an edge cloud-based application located at their appropriate level. The policies are described relative to that level, which may be more coarse-grained or concern fine-grained details.

TABLE 11 Description of policy-based configuration types associated to the proxies Type Subtype . . . TrafficManagement TrafficMirroring CircuitBreaking FaultInjection ServiceDiscovery LoadBalancing . . . Security Authentication Authorization Encryption . . . Observability PerformanceMonitoring EventLogging . . . . . .

TABLE 12 Definition of possible policy granularity levels associated to the proxies LevelTag Endpoint EndpointSet MicroserviceReplica CollocatedMicroserviceReplicaSet CollocatedMicroserviceSet CollocatedApplication CollocatedApplicationSet Node CollocatedNodeSet Cluster CollocatedClusterSet . . .

The configuration controller 700 receives inputs including system description and states 724, and application description and status 726.

FIG. 8 illustrates operations of the configuration controller in some embodiments of inventive concepts. In operation 1, based on a given input, the configuration controller 700 detects the need of reconfiguring the service mesh data plane when appropriate. For example, detection of non-compliance between actual latency and expected latency for one or a set of request chains can trigger a need of reconfiguring the service mesh. In operation 2, the configuration controller 700 determines an appropriate placement strategy for the components of the service mesh data plane using the proxy placement function 706.

In operation 3, parallelly or sequentially, the configuration controller 700 determines an appropriate selection strategy for the service mesh data plane components using the proxy selection function 704. In operation 4, based on the placement and selection strategies that were chosen in previous steps, the configuration controller 700 translates component-level policies accordingly using the policy conversion function 710 so that the policies can be enforced appropriately.

In operation 5, the configuration controller 700, based on the placement strategy, the selection strategy and the converted policies, generates an appropriate configuration template 714 using the configuration generation function 712. In operation 6, based on the configuration template 714, the data plane is reconfigured by injecting/ejecting proxies using the proxy injection function 718. In operation 7, the data plane components are reconfigured with the proper policies using the policy control function 720. Table 13 illustrates an example of a description of a shared request chain configuration.

TABLE 13 Description of shared request chain configuration Configuration ProxyID SelectionPolicy PlacementPolicy GranularityLevel ParentProxy Parameters . . . 10 {envoy_proxy, {AZ_Nordic, Cluster 3 { } default_egress, Cluster8, . . .} Node3, . . .} . . .

Operations of the configuration controller 700 (implemented using the structure of the block diagram of FIG. 3, 4 , or 5) will now be discussed using metric latency of a shared request chain as illustrated in FIG. 9 with reference to the flow chart of FIG. 10 according to some embodiments of inventive concepts. In the description that follows, while the configuration controller 700 may be hosted in the RAN node 300, the core network 400, the edge node 500, the network node 4160, base stations 4412, the host computer 4430, and the base station 4520, the edge node 500 shall be used to describe the functionality of the configuration controller 700. In the edge node 500, modules may be stored in memory 505 of FIG. 5 , and these modules may provide instructions so that when the instructions of a module are executed by respective communication device processing circuitry 503, processing circuitry 503 performs respective operations of the flow chart.

Prior to discussing FIG. 10 , FIG. 9 illustrates service instances 900, sidecar proxy instances 902, ingress gateway proxy instances 904, egress gateway proxy instances 906, and request chains 908. A request chain is defined as the communication path formed by a set of sequential requests going through a set of hops (i.e., proxies). A shared request chain is a request chain with shared “chunks” of communication paths (e.g., shared proxies).

Turning now to FIG. 10 , in block 1001, the processing circuitry 503 determines whether or not a configuration change in a service mesh data plane is needed based on at least one parameter. FIG. 11 illustrates an embodiment of determining whether or not the configuration change in the service mesh data plane is needed.

Turning to FIG. 11 , in block 1101, the processing circuitry 503 obtains a measurement of the at least one parameter. For example, the at least one parameter may be latency of a shared request chain. In block 1103, for each parameter of the at least one parameter, the processing circuitry 503 determines whether or not the parameter is outside of a tolerance threshold for the parameter. In block 1105, responsive to the at least one parameter being outside of the tolerance threshold, the processing circuitry 503 determines that the configuration change is needed.

Returning to FIG. 10 , in block 1003, the processing circuitry 503, responsive to determining that the configuration change is needed, identifies a set of possible configuration changes. In block 1005, the processing circuitry 503 generates a configuration based on the set of possible configuration changes. For example, the processing circuitry 503 may generate a configuration template as described above.

In block 1007, the processing circuitry 503 applies the configuration to the service mesh data plane. An example of the inventive concepts described in FIG. 10 shall now be described using latency of a shared request chain (see FIG. 9 ).

Turning to FIG. 12 , to determine whether or not a configuration change in a service mesh data plane is needed based on at least one parameter, the processing circuitry 503 in block 1201 obtains actual latency and associated expected latency. For example, actual latency and associated expected latency of a shared request chain may be obtained by the processing circuitry 503. To determine whether or not the parameter is outside of a tolerance threshold, the processing circuitry 503 in block 1203 determines whether or not the actual latency is less than or equal to the associated expected latency.

As the configuration change in this example is for at least one shared request chain (as defined above (see Table 13) the at least one shared request chain being a communication path formed by a set of sequential requests going through a set of shared proxies), to identify the set of possible configuration changes, the processing circuitry 503 in block 1205 identifies a set of shared request chains.

In block 1207, the processing circuitry 503 generates an optimized configuration for the set of shared request chain. FIG. 13 illustrates various embodiments of inventive concepts of generating an optimized configuration. Turning to FIG. 13 , in block 1301, the processing circuitry 503 searches for a possible configuration (e.g., a suitable configuration) from the set of possible configuration changes such that an associated policy granularity level is maximized.

Searching for an optimized configuration can be considered in some embodiments as a constrained optimization problem. For example, a request chain can be denoted as γ_(i). A set of shared request chains is denoted as Γ({right arrow over (p)})={γ_1, . . . , γ_n} where {right arrow over (p)} denotes the configuration of a set of shared request chains. {right arrow over (p)} can comprise the following configuration parameters:

-   -   Number of proxies to be part of the chains     -   Selection of the type of proxy (from available options, see         Table 8)     -   Placement decision for each proxy     -   . . . Other configuration parameters

$\overset{\rightarrow}{p} = \left\{ {\begin{matrix} {placement\_ strategy} & \\ {{selection\_ strategy}\ ;} & {\overset{\rightarrow}{p} \notin {IR}^{n}} \\ \ldots &  \end{matrix}\begin{matrix} \  \\

\end{matrix}} \right.$

The optimization function tries to find a suitable configuration of a set of shared request chains so as to maximize the granularity level related to the policy-based configuration of the proxies part of the shared request chains:

${\overset{\rightarrow}{p}}_{*} = {\underset{\overset{\operatorname{\rightarrow}}{p}}{\arg\max}\left( {{policy\_ granularity}{\_ level}\left( \overset{\rightarrow}{p} \right)} \right)}$

The optimization function introduced above is constrained by the fulfillment of the expected latency requirement related to the set of shared request chains:

expected_latency(γ_(i))−actual_latency(γ_(i))≥0;∀γ_(i)∈Γ({right arrow over (p)})

This constrained optimization problem can be solved by e.g. using combinatorial optimization theory and/or machine learning.

The processing circuitry 503 determines whether or not a suitable configuration has been found. Responsive to finding a possible configuration in block 1303, the processing circuitry 503 in block 1305 estimates a future latency overhead caused by the application of the possible configuration. In block 1307, the processing circuitry 503 determines whether the possible configuration causes non-fulfillment of a required latency. If the possible configuration causes non-fulfillment of the required latency, the search for the possible configuration continues. Responsive to determining the associated estimated latency is one of below or equal to the required latency, the processing circuitry 503 triggers in block 1309 a proxy configuration generator 708 to generate a configuration template. When the associated estimated latency of the possible configuration is below or equal to the required latency, the possible configuration can be designated as a new configuration of shared request chain(s).

Returning to FIG. 12 , in block 1209, the processing circuitry 503 generates a configuration from proxies that are part of the set of shared request chains. FIG. 14 illustrates various other embodiments of inventive concepts of generating a configuration from proxies that are part of the set of shared request chains. In some embodiments of the inventive concepts, the processing circuitry 503 receives, in block 1401, a proxy configuration optimizer trigger. In some of the embodiments, the proxy configuration optimizer trigger may be a command to generate the configuration.

Turning to FIG. 14 , in block 1403, the processing circuitry 503 obtains configuration policies related to the set of shared request chains. The configuration policies may be high-level configuration policies such as illustrated in Table 9.

In block 1405, the processing circuitry 503 identifies a required granularity level. Responsive to the required granularity being greater than a maximum granularity level in block 1407, the processing circuitry 503 in block 1400 maps the configuration policy to the maximum granularity level. Possible policy granularity levels in some embodiments in illustrated in Table 12.

In block 1411, the processing circuitry 503 identifies at least one proxy that can implement the configuration policy. In block 1413, the processing circuitry 503, for each proxy of the at least one proxy, generates policy configuration parameters based on a proxy type of the proxy. Examples of a proxy type are in Table 10.

In block 1415, for the configuration policies, the processing circuitry 503 can generate configuration templates per proxy based on a collection of the policy configuration parameters. Tables 8-12 may be used by the processing circuitry 503 in generating the configuration templates. In block 1417, the processing circuitry 503 may trigger a gradual configuration applier 716 to apply the configuration based on the configuration templates. The trigger may be a command to apply the configuration.

Returning to FIG. 12 , in block 1211, the processing circuitry 503 applies changes to the set of shared request chains. FIG. 15 illustrates various embodiments of inventive concepts of applying the configuration. In some embodiments of the inventive concepts, the processing circuitry 503 receives, in block 1501, a gradual configuration applier trigger. In some of the embodiments, the gradual configuration applier trigger may be a command to apply the configuration.

In block 1503, the processing circuitry 503 maps relations between the at least one proxy to proxies in a previous configuration. In block 1505, the processing circuitry 503 instantiates one or more proxies based on at least the configuration templates to create a new path. The new path can include proxies from the previous configuration.

In block 1507, the processing circuitry 503 minors a percentage of traffic going throughout at least one related previous proxy in the previous configuration. This is done by the processing circuitry 503 to determine whether or not latency of the new path is less than or equal to a latency of a previous path in block 1509. If the latency of the new path is not less than or equal to the latency of the previous path, the processing circuitry 503 performs block 1505-1509. In FIG. 15 , block 1507 is optional, as indicated by the dotted outline of the box. In an alternative embodiment, the processing circuitry 503 estimates latency of the new path and the processing circuitry 503 determines whether or not the estimated latency of the new path is less than or equal to a latency of a previous block or an estimated latency of the previous block.

Responsive to the latency of the new path being less than or equal to the latency of the previous path, in block 1511, the processing circuitry 503, in one or a set of proxies in the previous path, shifts traffic towards the one or more proxies in the new path related to the one or the set of proxies in the previous path. In block 1511 or alternatively before block 1513, the processing circuitry 503 may generate a routing policy to shift traffic through the new path. Responsive to the latency of the new path being less than or equal to the latency of the previous path, the processing circuitry 503 in block 1513 tears down proxies in the previous path. In other words, the processing circuitry 503 removes the proxies in the previous path that are not in the new path.

A further example of operations of the configuration controller in some embodiments of inventive concepts is illustrated in FIG. 16 , which illustrates a gaming application modeled in the form of a chain of microservices where service exposure is handled by Istio. Assume the overall system topology, as depicted in FIG. 6 , viz., SM1 controlling an edge cluster while SM2 controls two edge clusters. Among the microservices depicted in FIG. 16 , one of them is identified as data-intensive and latency-sensitive, viz., movieStreaming, whereas the other one, addReview is identified as data-intensive. In this example, movieStreaming is consumed by movieSearch and addReview is consumed by movieStreaming.

Assume a default configuration where each instance of each microservice is assigned a separate and default side-car proxy. In order to optimize this default configuration, the configuration controller 700 analyzes these microservices. This analysis can be carried out using performance data gathered while the microservices are executing. The configuration controller 700 would recognize that one microservice data-intensive and latency-sensitive, viz., movieStreaming, and another one is data-intensive, viz., addReview. Hence it will create the proxy selection strategy that under each service mesh SM1 and SM2, external requests (from out of the host service mesh) for all instances of each of these two microservices will be served by a performance-optimized side-car proxy. Additionally, for movieStreaming, internal requests (from the same host service mesh) will be served using AppSwitch, to avoid added delays in the data path. This will be the proxy selection step.

The next step will be proxy placement. Since movieStreaming is latency sensitive, the placement engine can decide to host movieStreaming together with its dependent service movieSearch in the same cluster, e.g. Edge Cluster 2. Thus, movieSearch will communicate with movieStreaming using system calls, via the AppSwitch plugin. For addReview, let's assume there are two instances hosted in Edge Cluster 3. In order to cope with all incoming requests, the placement strategy decides that it is more efficient if each of these instances has its own side-car proxy, thus avoiding queuing delays.

The next step will be policy conversion. This will translate the new policies into the level of granularity suitable for enabling the new side-car proxy instances to be executed in the edge clusters. Once this is done, the new configuration is generated, the new proxy instances are injected in SM1 and SM2 as described above, and both SM1 and SM2 reconfigure their data plane components so that the new policies can be enforced.

Hence injection of the new proxy instances would involve associating the microservice instances to these new proxy instances with the right policy configuration, and tearing down the old proxy instances.

Example embodiments are discussed below.

-   -   Embodiment 1. A method performed by a configuration controller         in a network, the method comprising:         -   determining (1001) whether or not a configuration change in             a service mesh data plane is needed based on at least one             parameter;         -   responsive to determining that the configuration change is             needed, identifying (1003) a set of possible configuration             changes;         -   generating (1005) a configuration based on the set of             possible configuration changes; and         -   applying (1007) the configuration to the service mesh data             plane.     -   Embodiment 2. The method of Embodiment 1 wherein determining         whether or not the configuration change in the service mesh data         plane is needed comprises:         -   obtaining (1101) a measurement of the at least one             parameter;         -   for each parameter of the at least one parameter,             determining (1103) whether or not the parameter is outside             of a tolerance threshold for the parameter; and         -   responsive to the at least one parameter being outside of             the tolerance threshold, determining (1105) that the             configuration change is needed.     -   Embodiment 3. The method of Embodiment 2 wherein the at least         one parameter is latency, and wherein:         -   obtaining the measurement of the at least one parameter             comprises obtaining (1201) actual latency and associated             expected latency;         -   determining whether or not the parameter is outside of the             tolerance threshold comprises determining (1203) whether or             not the actual latency is less than or equal to the             associated expected latency.     -   Embodiment 4. The method of Embodiment 3 wherein the         configuration change is for at least one shared request chain,         the at least one shared request chain being a communication path         formed by a set of sequential requests going through a set of         shared proxies.     -   Embodiment 5. The method of Embodiment 4 wherein:         -   identifying the set of possible configuration changes             comprises identifying (1205) a set of shared request chains;         -   generating the configuration based on the set of possible             configuration changes comprises:             -   generating (1207) an optimized configuration for the set                 of shared request chains; and             -   generating (1209) a configuration for proxies that are                 part of the set of shared request chains; and         -   applying the configuration to the service mesh data plane             comprises applying (1211) changes to the set of shared             request chains.     -   Embodiment 6. The method of any of Embodiments 4-5, wherein         generating the configuration based on the set of possible         configuration changes comprises:         -   searching (1301) for a possible configuration from the set             of possible configuration changes such that an associated             policy granularity level is maximized;         -   responsive to finding the possible configuration (1303):             -   estimating (1305) a future latency overhead caused by                 application of the possible configuration; and             -   determining (1307) whether the possible configuration                 causes non-fulfillment of a required latency; and         -   responsive to determining the future latency estimated is             one of below or equal to the required latency, triggering             (1309) a proxy configuration generator to generate a             configuration template.     -   Embodiment 7. The method of any of Embodiments 1-6, further         comprising generating a configuration template and receiving         (1401) a proxy configuration optimizer trigger.     -   Embodiment 8. The method of Embodiment 7, wherein generating the         configuration template comprises:         -   obtaining (1403) configuration policies related to a set of             shared request chains;         -   for each configuration policy of the configuration policies:             -   identifying (1405) a required granularity level;             -   responsive to the required granularity level being                 greater than a maximum granularity level (1407), mapping                 (1400) the configuration policy to the maximum                 granularity level;             -   identifying (1411) at least one proxy that can implement                 the configuration policy;             -   for each proxy of the at least one proxy, generating                 (1413) policy configuration parameters based on a proxy                 type of the proxy;         -   for the configuration policies, generating (1415)             configuration templates per proxy based on a collection of             the policy configuration parameters; and         -   triggering (1417) a gradual configuration applier to apply             the configuration based on the configuration templates.     -   Embodiment 9. The method of Embodiment 8, further comprising         receiving (1501) a gradual configuration applier trigger and         wherein applying the configuration comprises:         -   mapping (1503) relations between the at least one proxy to             proxies in a previous configuration;         -   instantiating (1505) one or more proxies based on at least             the configuration templates to create a new path;         -   determining (1509) whether or not latency of the new path is             less than or equal to a latency of a previous path;         -   responsive to the latency of the new path being less than or             equal to the latency of the previous path:             -   in one or a set of proxies in the previous path, shift                 (1511) traffic towards the one or more proxies in the                 new path related to the one or the set of proxies in the                 previous path; and             -   tearing down (1513) proxies in the previous path.     -   Embodiment 10. The method of Embodiment 9, wherein determining         whether or not latency of the new path is less than or equal to         the latency of the previous path comprises determining whether         or not latency of the new path is less than or equal to the         latency of the previous path based on mirroring (1507) a         percentage of traffic going throughout at least one related         previous proxy in the previous configuration.     -   Embodiment 11. The method of Embodiment 9, wherein determining         whether or not latency of the new path is less than or equal to         the latency of the previous path comprises determining whether         or not latency of the new path is less than or equal to the         latency of the previous path based on estimated latency of the         new path.     -   Embodiment 12. The method of any of Embodiments 1-8, further         comprising applying a configuration based on configuration         templates.     -   Embodiment 13. A configuration controller (700) in a network,         the configuration controller (700) comprising:         -   processing circuitry (303, 403, 503, 4170, 4528); and         -   memory (305, 405, 505,4180, 4390) coupled with the             processing circuitry, wherein the memory includes             instructions that when executed by the processing circuitry             (303, 403, 503, 4170, 4528) causes the configuration             controller (700) to perform operations comprising:             -   determining (1001) whether or not a configuration change                 in a service mesh data plane is needed based on at least                 one parameter;             -   responsive to determining that the configuration change                 is needed, identifying (1003) a set of possible                 configuration changes;             -   generating (1005) a configuration based on the set of                 possible configuration changes; and             -   applying (1007) the configuration to the service mesh                 data plane.     -   Embodiment 14. The configuration controller (700) of Embodiment         13 wherein in determining whether a configuration change in the         service mesh data plane is needed, the memory (305, 405,         505,4180, 4390) includes instructions that when executed by the         processing circuitry (303, 403, 503, 4170, 4528) causes the         configuration controller (700) to perform operations comprising:         -   obtaining (1101) a measurement of the at least one             parameter;         -   for each parameter of the at least one parameter,             determining (1103) whether or not the parameter is outside             of a tolerance threshold for the parameter; and         -   responsive to the at least one parameter being outside of             the tolerance threshold, determining (1105) that the             configuration change is needed.     -   Embodiment 15. The configuration controller (700) of Embodiment         14 wherein the at least one parameter is latency, and wherein         -   in obtaining the measurement of the at least one parameter,             the memory (305, 405, 505,4180, 4390) includes instructions             that when executed by the processing circuitry (303, 403,             503, 4170, 4528) causes the configuration controller (700)             to perform operations comprising obtaining (1201) actual             latency and associated expected latency         -   and in determining whether or not the parameter is outside             of a tolerance threshold, the memory (305, 405, 505,4180,             4390) includes instructions that when executed by the             processing circuitry (303, 403, 503, 4170, 4528) causes the             configuration controller (700) to perform operations             comprising determining (1203) whether or not the actual             latency is less than or equal to the associated expected             latency.     -   Embodiment 16. The configuration controller (700) of Embodiment         15 wherein the configuration change is for at least one shared         request chain, the at least one shared request chain being a         communication path formed by a set of sequential requests going         through a set of shared proxies.     -   Embodiment 17. The configuration controller (700) of Embodiment         16 wherein         -   in identifying the set of possible configuration changes,             the memory (305, 405, 505,4180, 4390) includes instructions             that when executed by the processing circuitry (303, 403,             503, 4170, 4528) causes the configuration controller (700)             to perform operations comprising identifying (1205) a set of             shared request chains;         -   in generating the configuration based on the set of possible             configuration changes, the memory includes instructions that             when executed by the processing circuitry (303, 403, 503,             4170, 4528) causes the configuration controller (700) to             perform operations comprising:             -   generating (1207) an optimized configuration for the set                 of shared request chains; and             -   generating (1209) a configuration for proxies that are                 part of the set of shared request chains; and         -   in applying the configuration to the service mesh data             plane, the memory includes instructions that when executed             by the processing circuitry causes the configuration             controller to perform operations comprising applying (1211)             changes to the sets of shared request chains.     -   Embodiment 18. The configuration controller (700) of any of         Embodiments 13-17, wherein in generating the configuration based         on the set of possible configuration changes, the memory (305,         405, 505,4180, 4390) includes instructions that when executed by         the processing circuitry (303, 403, 503, 4170, 4528) causes the         configuration controller (700) to perform operations comprising:         -   searching (1301) for a possible configuration from the set             of possible configuration changes such that an associated             policy granularity level is maximized;         -   responsive to finding the possible configuration (1303):             -   estimating (1305) a future latency overhead caused by                 application of the possible configuration; and             -   determining (1307) whether the possible configuration                 causes non-fulfillment of a required latency; and         -   responsive to determining the future latency estimated is             one of below or equal to a required latency, triggering             (1309) a proxy configuration generator to generate a             configuration template.     -   Embodiment 19. The configuration controller (700) of Embodiment         18, wherein the memory (305, 405, 505,4180, 4390) includes         further instructions that when executed by the processing         circuitry (303, 403, 503, 4170, 4528) causes the configuration         controller (700) to perform further operations comprising         generating the configuration template and receiving (1401) a         proxy configuration optimizer trigger.     -   Embodiment 20. The configuration controller (700) of Embodiment         18, wherein in generating the configuration template, the memory         (305, 405, 505,4180, 4390) includes instructions that when         executed by the processing circuitry (303, 403, 503, 4170, 4528)         causes the configuration controller (700) to perform operations         comprising:         -   obtaining (1403) configuration policies related to the at             least one shared request chain;         -   for each configuration policy of the configuration policies:             -   identifying (1405) a required granularity level;             -   responsive to the required granularity level being                 greater than a maximum granularity level (1407), mapping                 (1400) the configuration policy to the maximum                 granularity level;             -   identifying (1411) at least one proxy that can implement                 the configuration policy;             -   for each proxy of the at least one proxy, generating                 (1413) policy configuration parameters based on a proxy                 type of the proxy;         -   for the configuration policies, generating (1415)             configuration templates per proxy based on a collection of             the policy configuration parameters; and         -   triggering (1417) a gradual configuration applier to apply             the configuration based on the configuration templates.     -   Embodiment 21. The configuration controller (700) of Embodiment         20, wherein in applying the configuration, the memory (305, 405,         505,4180, 4390) includes instructions that when executed by the         processing circuitry (303, 403, 503, 4170, 4528) causes the         configuration controller (700) to perform operations comprising:         -   mapping (1503) relations between the at least one proxy to             proxies in a previous configuration;         -   instantiating (1505) one or more proxies based on at least             the configuration templates to create a new path;         -   determining (1509) whether or not latency of the new path is             less than or equal to a latency of a previous path;         -   responsive to the latency of the new path being less than or             equal to the latency of the previous path:             -   in one or a set of proxies in the previous path, shift                 (1511) traffic towards the one or more proxies in the                 new path related to the one or the set of proxies in the                 previous path; and             -   tearing down (1513) proxies in the previous path.     -   Embodiment 22. The configuration controller (700) of Embodiment         21, wherein in determining whether or not latency of the new         path is less than or equal to the latency of the previous path,         the memory (305, 405, 505,4180, 4390) includes instructions that         when executed by the processing circuitry (303, 403, 503, 4170,         4528) causes the configuration controller (700) to perform         operations comprising determining whether or not latency of the         new path is less than or equal to the latency of the previous         path based on mirroring (1507) a percentage of traffic going         throughout at least one related previous proxy in the previous         configuration.     -   Embodiment 23. The configuration controller (700) of Embodiment         21, wherein in determining whether or not latency of the new         path is less than or equal to the latency of the previous path,         the memory (305, 405, 505,4180, 4390) includes instructions that         when executed by the processing circuitry (303, 403, 503, 4170,         4528) causes the configuration controller (700) to perform         operations comprising determining whether or not latency of the         new path is less than or equal to the latency of the previous         path based on estimated latency of the new path.     -   Embodiment 24. The configuration controller (700) of any of         Embodiments 13-17, wherein in generating the configuration based         on the set of possible configuration changes, the memory         includes instructions that when executed by the processing         circuitry (303, 403, 503, 4170, 4528) causes the configuration         controller (700) to perform operations comprising generating a         configuration template.     -   Embodiment 25. The configuration controller (700) of any of         Embodiments 13-17, wherein in generating the configuration based         on the set of possible configuration changes, the memory         includes instructions that when executed by the processing         circuitry (303, 403, 503, 4170, 4528) causes the configuration         controller (700) to perform operations comprising generating a         configuration template and applying the configuration template.     -   Embodiment 26. A configuration controller (700) adapted to         perform according to any of Embodiments 1-12.     -   Embodiment 27. A computer program comprising program code to be         executed by processing circuitry of a configuration controller,         whereby execution of the program code causes the configuration         controller (700) to perform operations according to any of         embodiments 1-12.     -   Embodiment 28. A computer program product comprising a         non-transitory storage medium including program code to be         executed by processing circuitry of a configuration controller         (700), whereby execution of the program code causes the         configuration controller (700) to perform operations according         to any of embodiments 1-12. Explanations are provided below for         various abbreviations/acronyms used in the present disclosure.

Abbreviation Explanation CPU Central Processor Unit SM Service Mesh DNS Domain Name System GW Gateway API Application Program Interface TCP/IP Transport Control Protocol/Internet Protocol

References are identified below.

-   [1] W. Li, Y. Lemieux, J. Gao och Y. Han, “Service Mesh: Challenges,     State of the Art, and Future Research Opportunities,” San Francisco     East Bay, CA, USA, 2019. -   [2] Istio, “What is Istio?,” 2019. [Online]. Available:     https://istio.io/docs/concepts/what-is-istio/. [Anvand September     2019]. -   [3] Istio, “Istio Deployment Models,” 2019. [Online]. Available:     https://istio.io/docs/ops/deployment/deployment-models/. [Anvand 15     Sep. 2019]. -   [4] AppOrbit, “AppSwitch Documentation,” 2018. [Online]. Available:     https://appswitch.readthedocs.io/en/latest/. [Anvand 15 01 2020].

Additional explanation is provided below.

Generally, all terms used herein are to be interpreted according to their ordinary meaning in the relevant technical field, unless a different meaning is clearly given and/or is implied from the context in which it is used. All references to a/an/the element, apparatus, component, means, step, etc. are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any methods disclosed herein do not have to be performed in the exact order disclosed, unless a step is explicitly described as following or preceding another step and/or where it is implicit that a step must follow or precede another step. Any feature of any of the embodiments disclosed herein may be applied to any other embodiment, wherever appropriate. Likewise, any advantage of any of the embodiments may apply to any other embodiments, and vice versa. Other objectives, features and advantages of the enclosed embodiments will be apparent from the following description.

Some of the embodiments contemplated herein will now be described more fully with reference to the accompanying drawings. Other embodiments, however, are contained within the scope of the subject matter disclosed herein, the disclosed subject matter should not be construed as limited to only the embodiments set forth herein; rather, these embodiments are provided by way of example to convey the scope of the subject matter to those skilled in the art.

FIG. 17 illustrates a wireless network in accordance with some embodiments.

Although the subject matter described herein may be implemented in any appropriate type of system using any suitable components, the embodiments disclosed herein are described in relation to a wireless network, such as the example wireless network illustrated in FIG. 17 . For simplicity, the wireless network of FIG. 17 only depicts network 4106, network nodes 4160 and 4160 b, and WDs 4110, 4110 b, and 4110 c (also referred to as mobile terminals). In practice, a wireless network may further include any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device, such as a landline telephone, a service provider, or any other network node or end device. Of the illustrated components, network node 4160 and wireless device (WD) 4110 are depicted with additional detail. The wireless network may provide communication and other types of services to one or more wireless devices to facilitate the wireless devices' access to and/or use of the services provided by, or via, the wireless network.

The wireless network may comprise and/or interface with any type of communication, telecommunication, data, cellular, and/or radio network or other similar type of system. In some embodiments, the wireless network may be configured to operate according to specific standards or other types of predefined rules or procedures. Thus, particular embodiments of the wireless network may implement communication standards, such as Global System for Mobile Communications (GSM), Universal Mobile Telecommunications System (UMTS), Long Term Evolution (LTE), and/or other suitable 2G, 3G, 4G, or 5G standards; wireless local area network (WLAN) standards, such as the IEEE 802.11 standards; and/or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave and/or ZigBee standards.

Network 4106 may comprise one or more backhaul networks, core networks, IP networks, public switched telephone networks (PSTNs), packet data networks, optical networks, wide-area networks (WANs), local area networks (LANs), wireless local area networks (WLANs), wired networks, wireless networks, metropolitan area networks, and other networks to enable communication between devices.

Network node 4160 and WD 4110 comprise various components described in more detail below. These components work together in order to provide network node and/or wireless device functionality, such as providing wireless connections in a wireless network. In different embodiments, the wireless network may comprise any number of wired or wireless networks, network nodes, base stations, controllers, wireless devices, relay stations, and/or any other components or systems that may facilitate or participate in the communication of data and/or signals whether via wired or wireless connections.

As used herein, network node refers to equipment capable, configured, arranged and/or operable to communicate directly or indirectly with a wireless device and/or with other network nodes or equipment in the wireless network to enable and/or provide wireless access to the wireless device and/or to perform other functions (e.g., administration) in the wireless network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)). Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and may then also be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station may be a relay node or a relay donor node controlling a relay. A network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units and/or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio. Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS). Yet further examples of network nodes include multi-standard radio (MSR) equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, multi-cell/multicast coordination entities (MCEs), core network nodes (e.g., MSCs, MMEs), O&M nodes, OSS nodes, SON nodes, positioning nodes (e.g., E-SMLCs), and/or MDTs. As another example, a network node may be a virtual network node as described in more detail below. More generally, however, network nodes may represent any suitable device (or group of devices) capable, configured, arranged, and/or operable to enable and/or provide a wireless device with access to the wireless network or to provide some service to a wireless device that has accessed the wireless network.

In FIG. 17 , network node 4160 includes processing circuitry 4170, device readable medium 4180, interface 4190, auxiliary equipment 4184, power source 4186, power circuitry 4187, and antenna 4162. Although network node 4160 illustrated in the example wireless network of FIG. 17 may represent a device that includes the illustrated combination of hardware components, other embodiments may comprise network nodes with different combinations of components. It is to be understood that a network node comprises any suitable combination of hardware and/or software needed to perform the tasks, features, functions and methods disclosed herein. Moreover, while the components of network node 4160 are depicted as single boxes located within a larger box, or nested within multiple boxes, in practice, a network node may comprise multiple different physical components that make up a single illustrated component (e.g., device readable medium 4180 may comprise multiple separate hard drives as well as multiple RAM modules).

Similarly, network node 4160 may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, or a BTS component and a BSC component, etc.), which may each have their own respective components. In certain scenarios in which network node 4160 comprises multiple separate components (e.g., BTS and BSC components), one or more of the separate components may be shared among several network nodes. For example, a single RNC may control multiple NodeB's. In such a scenario, each unique NodeB and RNC pair, may in some instances be considered a single separate network node. In some embodiments, network node 4160 may be configured to support multiple radio access technologies (RATs). In such embodiments, some components may be duplicated (e.g., separate device readable medium 4180 for the different RATs) and some components may be reused (e.g., the same antenna 4162 may be shared by the RATs). Network node 4160 may also include multiple sets of the various illustrated components for different wireless technologies integrated into network node 4160, such as, for example, GSM, WCDMA, LTE, NR, WiFi, or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within network node 4160.

Processing circuitry 4170 is configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being provided by a network node. These operations performed by processing circuitry 4170 may include processing information obtained by processing circuitry 4170 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the network node, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.

Processing circuitry 4170 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and/or encoded logic operable to provide, either alone or in conjunction with other network node 4160 components, such as device readable medium 4180, network node 4160 functionality. For example, processing circuitry 4170 may execute instructions stored in device readable medium 4180 or in memory within processing circuitry 4170. Such functionality may include providing any of the various wireless features, functions, or benefits discussed herein. In some embodiments, processing circuitry 4170 may include a system on a chip (SOC).

In some embodiments, processing circuitry 4170 may include one or more of radio frequency (RF) transceiver circuitry 4172 and baseband processing circuitry 4174. In some embodiments, radio frequency (RF) transceiver circuitry 4172 and baseband processing circuitry 4174 may be on separate chips (or sets of chips), boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry 4172 and baseband processing circuitry 4174 may be on the same chip or set of chips, boards, or units

In certain embodiments, some or all of the functionality described herein as being provided by a network node, base station, eNB or other such network device may be performed by processing circuitry 4170 executing instructions stored on device readable medium 4180 or memory within processing circuitry 4170. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 4170 without executing instructions stored on a separate or discrete device readable medium, such as in a hard-wired manner In any of those embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 4170 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 4170 alone or to other components of network node 4160, but are enjoyed by network node 4160 as a whole, and/or by end users and the wireless network generally.

Device readable medium 4180 may comprise any form of volatile or non-volatile computer readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (for example, a hard disk), removable storage media (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computer-executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 4170. Device readable medium 4180 may store any suitable instructions, data or information, including a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 4170 and, utilized by network node 4160. Device readable medium 4180 may be used to store any calculations made by processing circuitry 4170 and/or any data received via interface 4190. In some embodiments, processing circuitry 4170 and device readable medium 4180 may be considered to be integrated.

Interface 4190 is used in the wired or wireless communication of signalling and/or data between network node 4160, network 4106, and/or WDs 4110. As illustrated, interface 4190 comprises port(s)/terminal(s) 4194 to send and receive data, for example to and from network 4106 over a wired connection. Interface 4190 also includes radio front end circuitry 4192 that may be coupled to, or in certain embodiments a part of, antenna 4162. Radio front end circuitry 4192 comprises filters 4198 and amplifiers 4196. Radio front end circuitry 4192 may be connected to antenna 4162 and processing circuitry 4170. Radio front end circuitry may be configured to condition signals communicated between antenna 4162 and processing circuitry 4170. Radio front end circuitry 4192 may receive digital data that is to be sent out to other network nodes or WDs via a wireless connection. Radio front end circuitry 4192 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 4198 and/or amplifiers 4196. The radio signal may then be transmitted via antenna 4162. Similarly, when receiving data, antenna 4162 may collect radio signals which are then converted into digital data by radio front end circuitry 4192. The digital data may be passed to processing circuitry 4170. In other embodiments, the interface may comprise different components and/or different combinations of components.

In certain alternative embodiments, network node 4160 may not include separate radio front end circuitry 4192, instead, processing circuitry 4170 may comprise radio front end circuitry and may be connected to antenna 4162 without separate radio front end circuitry 4192. Similarly, in some embodiments, all or some of RF transceiver circuitry 4172 may be considered a part of interface 4190. In still other embodiments, interface 4190 may include one or more ports or terminals 4194, radio front end circuitry 4192, and RF transceiver circuitry 4172, as part of a radio unit (not shown), and interface 4190 may communicate with baseband processing circuitry 4174, which is part of a digital unit (not shown).

Antenna 4162 may include one or more antennas, or antenna arrays, configured to send and/or receive wireless signals. Antenna 4162 may be coupled to radio front end circuitry 4192 and may be any type of antenna capable of transmitting and receiving data and/or signals wirelessly. In some embodiments, antenna 4162 may comprise one or more omni-directional, sector or panel antennas operable to transmit/receive radio signals between, for example, 2 GHz and 66 GHz. An omni-directional antenna may be used to transmit/receive radio signals in any direction, a sector antenna may be used to transmit/receive radio signals from devices within a particular area, and a panel antenna may be a line of sight antenna used to transmit/receive radio signals in a relatively straight line. In some instances, the use of more than one antenna may be referred to as MIMO. In certain embodiments, antenna 4162 may be separate from network node 4160 and may be connectable to network node 4160 through an interface or port.

Antenna 4162, interface 4190, and/or processing circuitry 4170 may be configured to perform any receiving operations and/or certain obtaining operations described herein as being performed by a network node. Any information, data and/or signals may be received from a wireless device, another network node and/or any other network equipment. Similarly, antenna 4162, interface 4190, and/or processing circuitry 4170 may be configured to perform any transmitting operations described herein as being performed by a network node. Any information, data and/or signals may be transmitted to a wireless device, another network node and/or any other network equipment.

Power circuitry 4187 may comprise, or be coupled to, power management circuitry and is configured to supply the components of network node 4160 with power for performing the functionality described herein. Power circuitry 4187 may receive power from power source 4186. Power source 4186 and/or power circuitry 4187 may be configured to provide power to the various components of network node 4160 in a form suitable for the respective components (e.g., at a voltage and current level needed for each respective component). Power source 4186 may either be included in, or external to, power circuitry 4187 and/or network node 4160. For example, network node 4160 may be connectable to an external power source (e.g., an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power source supplies power to power circuitry 4187. As a further example, power source 4186 may comprise a source of power in the form of a battery or battery pack which is connected to, or integrated in, power circuitry 4187. The battery may provide backup power should the external power source fail. Other types of power sources, such as photovoltaic devices, may also be used.

Alternative embodiments of network node 4160 may include additional components beyond those shown in FIG. 17 that may be responsible for providing certain aspects of the network node's functionality, including any of the functionality described herein and/or any functionality necessary to support the subject matter described herein. For example, network node 4160 may include user interface equipment to allow input of information into network node 4160 and to allow output of information from network node 4160. This may allow a user to perform diagnostic, maintenance, repair, and other administrative functions for network node 4160.

As used herein, wireless device (WD) refers to a device capable, configured, arranged and/or operable to communicate wirelessly with network nodes and/or other wireless devices. Unless otherwise noted, the term WD may be used interchangeably herein with user equipment (UE). Communicating wirelessly may involve transmitting and/or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and/or other types of signals suitable for conveying information through air. In some embodiments, a WD may be configured to transmit and/or receive information without direct human interaction. For instance, a WD may be designed to transmit information to a network on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the network. Examples of a WD include, but are not limited to, a smart phone, a mobile phone, a cell phone, a voice over IP (VoIP) phone, a wireless local loop phone, a desktop computer, a personal digital assistant (PDA), a wireless cameras, a gaming console or device, a music storage device, a playback appliance, a wearable terminal device, a wireless endpoint, a mobile station, a tablet, a laptop, a laptop-embedded equipment (LEE), a laptop-mounted equipment (LME), a smart device, a wireless customer-premise equipment (CPE). a vehicle-mounted wireless terminal device, etc. A WD may support device-to-device (D2D) communication, for example by implementing a 3GPP standard for sidelink communication, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-everything (V2X) and may in this case be referred to as a D2D communication device. As yet another specific example, in an Internet of Things (IoT) scenario, a WD may represent a machine or other device that performs monitoring and/or measurements, and transmits the results of such monitoring and/or measurements to another WD and/or a network node. The WD may in this case be a machine-to-machine (M2M) device, which may in a 3GPP context be referred to as an MTC device. As one particular example, the WD may be a UE implementing the 3GPP narrow band internet of things (NB-IoT) standard. Particular examples of such machines or devices are sensors, metering devices such as power meters, industrial machinery, or home or personal appliances (e.g. refrigerators, televisions, etc.) personal wearables (e.g., watches, fitness trackers, etc.). In other scenarios, a WD may represent a vehicle or other equipment that is capable of monitoring and/or reporting on its operational status or other functions associated with its operation. A WD as described above may represent the endpoint of a wireless connection, in which case the device may be referred to as a wireless terminal. Furthermore, a WD as described above may be mobile, in which case it may also be referred to as a mobile device or a mobile terminal

As illustrated, wireless device 4110 includes antenna 4111, interface 4114, processing circuitry 4120, device readable medium 4130, user interface equipment 4132, auxiliary equipment 4134, power source 4136 and power circuitry 4137. WD 4110 may include multiple sets of one or more of the illustrated components for different wireless technologies supported by WD 4110, such as, for example, GSM, WCDMA, LTE, NR, WiFi, WiMAX, or Bluetooth wireless technologies, just to mention a few. These wireless technologies may be integrated into the same or different chips or set of chips as other components within WD 4110.

Antenna 4111 may include one or more antennas or antenna arrays, configured to send and/or receive wireless signals, and is connected to interface 4114. In certain alternative embodiments, antenna 4111 may be separate from WD 4110 and be connectable to WD 4110 through an interface or port. Antenna 4111, interface 4114, and/or processing circuitry 4120 may be configured to perform any receiving or transmitting operations described herein as being performed by a WD. Any information, data and/or signals may be received from a network node and/or another WD. In some embodiments, radio front end circuitry and/or antenna 4111 may be considered an interface.

As illustrated, interface 4114 comprises radio front end circuitry 4112 and antenna 4111. Radio front end circuitry 4112 comprise one or more filters 4118 and amplifiers 4116. Radio front end circuitry 4112 is connected to antenna 4111 and processing circuitry 4120, and is configured to condition signals communicated between antenna 4111 and processing circuitry 4120. Radio front end circuitry 4112 may be coupled to or a part of antenna 4111. In some embodiments, WD 4110 may not include separate radio front end circuitry 4112; rather, processing circuitry 4120 may comprise radio front end circuitry and may be connected to antenna 4111. Similarly, in some embodiments, some or all of RF transceiver circuitry 4122 may be considered a part of interface 4114. Radio front end circuitry 4112 may receive digital data that is to be sent out to other network nodes or WDs via a wireless connection. Radio front end circuitry 4112 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters 4118 and/or amplifiers 4116. The radio signal may then be transmitted via antenna 4111. Similarly, when receiving data, antenna 4111 may collect radio signals which are then converted into digital data by radio front end circuitry 4112. The digital data may be passed to processing circuitry 4120. In other embodiments, the interface may comprise different components and/or different combinations of components.

Processing circuitry 4120 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software, and/or encoded logic operable to provide, either alone or in conjunction with other WD 4110 components, such as device readable medium 4130, WD 4110 functionality. Such functionality may include providing any of the various wireless features or benefits discussed herein. For example, processing circuitry 4120 may execute instructions stored in device readable medium 4130 or in memory within processing circuitry 4120 to provide the functionality disclosed herein.

As illustrated, processing circuitry 4120 includes one or more of RF transceiver circuitry 4122, baseband processing circuitry 4124, and application processing circuitry 4126. In other embodiments, the processing circuitry may comprise different components and/or different combinations of components. In certain embodiments processing circuitry 4120 of WD 4110 may comprise a SOC. In some embodiments, RF transceiver circuitry 4122, baseband processing circuitry 4124, and application processing circuitry 4126 may be on separate chips or sets of chips. In alternative embodiments, part or all of baseband processing circuitry 4124 and application processing circuitry 4126 may be combined into one chip or set of chips, and RF transceiver circuitry 4122 may be on a separate chip or set of chips. In still alternative embodiments, part or all of RF transceiver circuitry 4122 and baseband processing circuitry 4124 may be on the same chip or set of chips, and application processing circuitry 4126 may be on a separate chip or set of chips. In yet other alternative embodiments, part or all of RF transceiver circuitry 4122, baseband processing circuitry 4124, and application processing circuitry 4126 may be combined in the same chip or set of chips. In some embodiments, RF transceiver circuitry 4122 may be a part of interface 4114. RF transceiver circuitry 4122 may condition RF signals for processing circuitry 4120.

In certain embodiments, some or all of the functionality described herein as being performed by a WD may be provided by processing circuitry 4120 executing instructions stored on device readable medium 4130, which in certain embodiments may be a computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by processing circuitry 4120 without executing instructions stored on a separate or discrete device readable storage medium, such as in a hard-wired manner In any of those particular embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 4120 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 4120 alone or to other components of WD 4110, but are enjoyed by WD 4110 as a whole, and/or by end users and the wireless network generally.

Processing circuitry 4120 may be configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being performed by a WD. These operations, as performed by processing circuitry 4120, may include processing information obtained by processing circuitry 4120 by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored by WD 4110, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.

Device readable medium 4130 may be operable to store a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 4120. Device readable medium 4130 may include computer memory (e.g., Random Access Memory (RAM) or Read Only Memory (ROM)), mass storage media (e.g., a hard disk), removable storage media (e.g., a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computer executable memory devices that store information, data, and/or instructions that may be used by processing circuitry 4120. In some embodiments, processing circuitry 4120 and device readable medium 4130 may be considered to be integrated.

User interface equipment 4132 may provide components that allow for a human user to interact with WD 4110. Such interaction may be of many forms, such as visual, audial, tactile, etc. User interface equipment 4132 may be operable to produce output to the user and to allow the user to provide input to WD 4110. The type of interaction may vary depending on the type of user interface equipment 4132 installed in WD 4110. For example, if WD 4110 is a smart phone, the interaction may be via a touch screen; if WD 4110 is a smart meter, the interaction may be through a screen that provides usage (e.g., the number of gallons used) or a speaker that provides an audible alert (e.g., if smoke is detected). User interface equipment 4132 may include input interfaces, devices and circuits, and output interfaces, devices and circuits. User interface equipment 4132 is configured to allow input of information into WD 4110, and is connected to processing circuitry 4120 to allow processing circuitry 4120 to process the input information. User interface equipment 4132 may include, for example, a microphone, a proximity or other sensor, keys/buttons, a touch display, one or more cameras, a USB port, or other input circuitry. User interface equipment 4132 is also configured to allow output of information from WD 4110, and to allow processing circuitry 4120 to output information from WD 4110. User interface equipment 4132 may include, for example, a speaker, a display, vibrating circuitry, a USB port, a headphone interface, or other output circuitry. Using one or more input and output interfaces, devices, and circuits, of user interface equipment 4132, WD 4110 may communicate with end users and/or the wireless network, and allow them to benefit from the functionality described herein.

Auxiliary equipment 4134 is operable to provide more specific functionality which may not be generally performed by WDs. This may comprise specialized sensors for doing measurements for various purposes, interfaces for additional types of communication such as wired communications etc. The inclusion and type of components of auxiliary equipment 4134 may vary depending on the embodiment and/or scenario.

Power source 4136 may, in some embodiments, be in the form of a battery or battery pack. Other types of power sources, such as an external power source (e.g., an electricity outlet), photovoltaic devices or power cells, may also be used. WD 4110 may further comprise power circuitry 4137 for delivering power from power source 4136 to the various parts of WD 4110 which need power from power source 4136 to carry out any functionality described or indicated herein. Power circuitry 4137 may in certain embodiments comprise power management circuitry. Power circuitry 4137 may additionally or alternatively be operable to receive power from an external power source; in which case WD 4110 may be connectable to the external power source (such as an electricity outlet) via input circuitry or an interface such as an electrical power cable. Power circuitry 4137 may also in certain embodiments be operable to deliver power from an external power source to power source 4136. This may be, for example, for the charging of power source 4136. Power circuitry 4137 may perform any formatting, converting, or other modification to the power from power source 4136 to make the power suitable for the respective components of WD 4110 to which power is supplied.

FIG. 18 illustrates a user Equipment in accordance with some embodiments.

FIG. 18 illustrates one embodiment of a UE in accordance with various aspects described herein. As used herein, a user equipment or UE may not necessarily have a user in the sense of a human user who owns and/or operates the relevant device. Instead, a UE may represent a device that is intended for sale to, or operation by, a human user but which may not, or which may not initially, be associated with a specific human user (e.g., a smart sprinkler controller). Alternatively, a UE may represent a device that is not intended for sale to, or operation by, an end user but which may be associated with or operated for the benefit of a user (e.g., a smart power meter). UE 42200 may be any UE identified by the 3rd Generation Partnership Project (3GPP), including a NB-IoT UE, a machine type communication (MTC) UE, and/or an enhanced MTC (eMTC) UE. UE 4200, as illustrated in FIG. 18 , is one example of a WD configured for communication in accordance with one or more communication standards promulgated by the 3rd Generation Partnership Project (3GPP), such as 3GPP's GSM, UMTS, LTE, and/or 5G standards. As mentioned previously, the term WD and UE may be used interchangeable. Accordingly, although FIG. 18 is a UE, the components discussed herein are equally applicable to a WD, and vice-versa.

In FIG. 18 , UE 4200 includes processing circuitry 4201 that is operatively coupled to input/output interface 4205, radio frequency (RF) interface 4209, network connection interface 4211, memory 4215 including random access memory (RAM) 4217, read-only memory (ROM) 4219, and storage medium 4221 or the like, communication subsystem 4231, power source 4213, and/or any other component, or any combination thereof. Storage medium 4221 includes operating system 4223, application program 4225, and data 4227. In other embodiments, storage medium 4221 may include other similar types of information. Certain UEs may utilize all of the components shown in FIG. 18 , or only a subset of the components. The level of integration between the components may vary from one UE to another UE. Further, certain UEs may contain multiple instances of a component, such as multiple processors, memories, transceivers, transmitters, receivers, etc.

In FIG. 18 , processing circuitry 4201 may be configured to process computer instructions and data. Processing circuitry 4201 may be configured to implement any sequential state machine operative to execute machine instructions stored as machine-readable computer programs in the memory, such as one or more hardware-implemented state machines (e.g., in discrete logic, FPGA, ASIC, etc.); programmable logic together with appropriate firmware; one or more stored program, general-purpose processors, such as a microprocessor or Digital Signal Processor (DSP), together with appropriate software; or any combination of the above. For example, the processing circuitry 4201 may include two central processing units (CPUs). Data may be information in a form suitable for use by a computer.

In the depicted embodiment, input/output interface 4205 may be configured to provide a communication interface to an input device, output device, or input and output device. UE 4200 may be configured to use an output device via input/output interface 4205. An output device may use the same type of interface port as an input device. For example, a USB port may be used to provide input to and output from UE 4200. The output device may be a speaker, a sound card, a video card, a display, a monitor, a printer, an actuator, an emitter, a smartcard, another output device, or any combination thereof. UE 4200 may be configured to use an input device via input/output interface 4205 to allow a user to capture information into UE 4200. The input device may include a touch-sensitive or presence-sensitive display, a camera (e.g., a digital camera, a digital video camera, a web camera, etc.), a microphone, a sensor, a mouse, a trackball, a directional pad, a trackpad, a scroll wheel, a smartcard, and the like. The presence-sensitive display may include a capacitive or resistive touch sensor to sense input from a user. A sensor may be, for instance, an accelerometer, a gyroscope, a tilt sensor, a force sensor, a magnetometer, an optical sensor, a proximity sensor, another like sensor, or any combination thereof. For example, the input device may be an accelerometer, a magnetometer, a digital camera, a microphone, and an optical sensor.

In FIG. 18 , RF interface 4209 may be configured to provide a communication interface to RF components such as a transmitter, a receiver, and an antenna. Network connection interface 4211 may be configured to provide a communication interface to network 4243 a. Network 4243 a may encompass wired and/or wireless networks such as a local-area network (LAN), a wide-area network (WAN), a computer network, a wireless network, a telecommunications network, another like network or any combination thereof. For example, network 4243 a may comprise a Wi-Fi network. Network connection interface 4211 may be configured to include a receiver and a transmitter interface used to communicate with one or more other devices over a communication network according to one or more communication protocols, such as Ethernet, TCP/IP, SONET, ATM, or the like. Network connection interface 4211 may implement receiver and transmitter functionality appropriate to the communication network links (e.g., optical, electrical, and the like). The transmitter and receiver functions may share circuit components, software or firmware, or alternatively may be implemented separately.

RAM 4217 may be configured to interface via bus 4202 to processing circuitry 4201 to provide storage or caching of data or computer instructions during the execution of software programs such as the operating system, application programs, and device drivers. ROM 4219 may be configured to provide computer instructions or data to processing circuitry 4201. For example, ROM 4219 may be configured to store invariant low-level system code or data for basic system functions such as basic input and output (I/O), startup, or reception of keystrokes from a keyboard that are stored in a non-volatile memory. Storage medium 4221 may be configured to include memory such as RAM, ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic disks, optical disks, floppy disks, hard disks, removable cartridges, or flash drives. In one example, storage medium 4221 may be configured to include operating system 4223, application program 4225 such as a web browser application, a widget or gadget engine or another application, and data file 4227. Storage medium 4221 may store, for use by UE 4200, any of a variety of various operating systems or combinations of operating systems.

Storage medium 4221 may be configured to include a number of physical drive units, such as redundant array of independent disks (RAID), floppy disk drive, flash memory, USB flash drive, external hard disk drive, thumb drive, pen drive, key drive, high-density digital versatile disc (HD-DVD) optical disc drive, internal hard disk drive, Blu-Ray optical disc drive, holographic digital data storage (HDDS) optical disc drive, external mini-dual in-line memory module (DIMM), synchronous dynamic random access memory (SDRAM), external micro-DIMM SDRAM, smartcard memory such as a subscriber identity module or a removable user identity (SIM/RUIM) module, other memory, or any combination thereof. Storage medium 4221 may allow UE 4200 to access computer-executable instructions, application programs or the like, stored on transitory or non-transitory memory media, to off-load data, or to upload data. An article of manufacture, such as one utilizing a communication system may be tangibly embodied in storage medium 4221, which may comprise a device readable medium.

In FIG. 18 , processing circuitry 4201 may be configured to communicate with network 4243 b using communication subsystem 4231. Network 4243 a and network 4243 b may be the same network or networks or different network or networks. Communication subsystem 4231 may be configured to include one or more transceivers used to communicate with network 4243 b. For example, communication subsystem 4231 may be configured to include one or more transceivers used to communicate with one or more remote transceivers of another device capable of wireless communication such as another WD, UE, or base station of a radio access network (RAN) according to one or more communication protocols, such as IEEE 802.11, CDMA, WCDMA, GSM, LTE, UTRAN, WiMax, or the like. Each transceiver may include transmitter 4233 and/or receiver 4235 to implement transmitter or receiver functionality, respectively, appropriate to the RAN links (e.g., frequency allocations and the like). Further, transmitter 4233 and receiver 4235 of each transceiver may share circuit components, software or firmware, or alternatively may be implemented separately.

In the illustrated embodiment, the communication functions of communication subsystem 4231 may include data communication, voice communication, multimedia communication, short-range communications such as Bluetooth, near-field communication, location-based communication such as the use of the global positioning system (GPS) to determine a location, another like communication function, or any combination thereof. For example, communication subsystem 4231 may include cellular communication, Wi-Fi communication, Bluetooth communication, and GPS communication. Network 4243 b may encompass wired and/or wireless networks such as a local-area network (LAN), a wide-area network (WAN), a computer network, a wireless network, a telecommunications network, another like network or any combination thereof. For example, network 4243 b may be a cellular network, a Wi-Fi network, and/or a near-field network. Power source 4213 may be configured to provide alternating current (AC) or direct current (DC) power to components of UE 4200.

The features, benefits and/or functions described herein may be implemented in one of the components of UE 4200 or partitioned across multiple components of UE 4200. Further, the features, benefits, and/or functions described herein may be implemented in any combination of hardware, software or firmware. In one example, communication subsystem 4231 may be configured to include any of the components described herein. Further, processing circuitry 4201 may be configured to communicate with any of such components over bus 4202. In another example, any of such components may be represented by program instructions stored in memory that when executed by processing circuitry 4201 perform the corresponding functions described herein. In another example, the functionality of any of such components may be partitioned between processing circuitry 4201 and communication subsystem 4231. In another example, the non-computationally intensive functions of any of such components may be implemented in software or firmware and the computationally intensive functions may be implemented in hardware.

FIG. 19 illustrates a virtualization environment in accordance with some embodiments.

FIG. 19 is a schematic block diagram illustrating a virtualization environment 4300 in which functions implemented by some embodiments may be virtualized. In the present context, virtualizing means creating virtual versions of apparatuses or devices which may include virtualizing hardware platforms, storage devices and networking resources. As used herein, virtualization can be applied to a node (e.g., a virtualized base station or a virtualized radio access node) or to a device (e.g., a UE, a wireless device or any other type of communication device) or components thereof and relates to an implementation in which at least a portion of the functionality is implemented as one or more virtual components (e.g., via one or more applications, components, functions, virtual machines or containers executing on one or more physical processing nodes in one or more networks).

In some embodiments, some or all of the functions described herein may be implemented as virtual components executed by one or more virtual machines implemented in one or more virtual environments 4300 hosted by one or more of hardware nodes 4330. Further, in embodiments in which the virtual node is not a radio access node or does not require radio connectivity (e.g., a core network node), then the network node may be entirely virtualized.

The functions may be implemented by one or more applications 4320 (which may alternatively be called software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc.) operative to implement some of the features, functions, and/or benefits of some of the embodiments disclosed herein. Applications 4320 are run in virtualization environment 4300 which provides hardware 4330 comprising processing circuitry 4360 and memory 4390. Memory 4390 contains instructions 4395 executable by processing circuitry 4360 whereby application 4320 is operative to provide one or more of the features, benefits, and/or functions disclosed herein.

Virtualization environment 4300, comprises general-purpose or special-purpose network hardware devices 4330 comprising a set of one or more processors or processing circuitry 4360, which may be commercial off-the-shelf (COTS) processors, dedicated Application Specific Integrated Circuits (ASICs), or any other type of processing circuitry including digital or analog hardware components or special purpose processors. Each hardware device may comprise memory 4390-1 which may be non-persistent memory for temporarily storing instructions 4395 or software executed by processing circuitry 4360. Each hardware device may comprise one or more network interface controllers (NICs) 4370, also known as network interface cards, which include physical network interface 4380. Each hardware device may also include non-transitory, persistent, machine-readable storage media 4390-2 having stored therein software 4395 and/or instructions executable by processing circuitry 4360. Software 4395 may include any type of software including software for instantiating one or more virtualization layers 4350 (also referred to as hypervisors), software to execute virtual machines 4340 as well as software allowing it to execute functions, features and/or benefits described in relation with some embodiments described herein.

Virtual machines 4340 comprise virtual processing, virtual memory, virtual networking or interface and virtual storage, and may be run by a corresponding virtualization layer 4350 or hypervisor. Different embodiments of the instance of virtual appliance 4320 may be implemented on one or more of virtual machines 4340, and the implementations may be made in different ways.

During operation, processing circuitry 4360 executes software 4395 to instantiate the hypervisor or virtualization layer 4350, which may sometimes be referred to as a virtual machine monitor (VMM). Virtualization layer 4350 may present a virtual operating platform that appears like networking hardware to virtual machine 4340.

As shown in FIG. 19 , hardware 4330 may be a standalone network node with generic or specific components. Hardware 4330 may comprise antenna 43225 and may implement some functions via virtualization. Alternatively, hardware 4330 may be part of a larger cluster of hardware (e.g. such as in a data center or customer premise equipment (CPE)) where many hardware nodes work together and are managed via management and orchestration (MANO) 43100, which, among others, oversees lifecycle management of applications 4320.

Virtualization of the hardware is in some contexts referred to as network function virtualization (NFV). NFV may be used to consolidate many network equipment types onto industry standard high volume server hardware, physical switches, and physical storage, which can be located in data centers, and customer premise equipment.

In the context of NFV, virtual machine 4340 may be a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine. Each of virtual machines 4340, and that part of hardware 4330 that executes that virtual machine, be it hardware dedicated to that virtual machine and/or hardware shared by that virtual machine with others of the virtual machines 4340, forms a separate virtual network elements (VNE).

Still in the context of NFV, Virtual Network Function (VNF) is responsible for handling specific network functions that run in one or more virtual machines 4340 on top of hardware networking infrastructure 4330 and corresponds to application 4320 in FIG. 19 .

In some embodiments, one or more radio units 43200 that each include one or more transmitters 43220 and one or more receivers 43210 may be coupled to one or more antennas 43225. Radio units 43200 may communicate directly with hardware nodes 4330 via one or more appropriate network interfaces and may be used in combination with the virtual components to provide a virtual node with radio capabilities, such as a radio access node or a base station.

In some embodiments, some signalling can be effected with the use of control system 43230 which may alternatively be used for communication between the hardware nodes 4330 and radio units 43200.

FIG. 20 illustrates a telecommunication network connected via an intermediate network to a host computer in accordance with some embodiments.

With reference to FIG. 20 , in accordance with an embodiment, a communication system includes telecommunication network 4410, such as a 3GPP-type cellular network, which comprises access network 4411, such as a radio access network, and core network 4414. Access network 4411 comprises a plurality of base stations 4412 a, 4412 b, 4412 c, such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area 4413 a, 4413 b, 4413 c. Each base station 4412 a, 4412 b, 4412 c is connectable to core network 4414 over a wired or wireless connection 4415. A first UE 4491 located in coverage area 4413 c is configured to wirelessly connect to, or be paged by, the corresponding base station 4412 c. A second UE 4492 in coverage area 4413 a is wirelessly connectable to the corresponding base station 4412 a. While a plurality of UEs 4491, 4492 are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole UE is in the coverage area or where a sole UE is connecting to the corresponding base station 4412.

Telecommunication network 4410 is itself connected to host computer 4430, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm. Host computer 4430 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider. Connections 4421 and 4422 between telecommunication network 4410 and host computer 4430 may extend directly from core network 4414 to host computer 4430 or may go via an optional intermediate network 4420. Intermediate network 4420 may be one of, or a combination of more than one of, a public, private or hosted network; intermediate network 4420, if any, may be a backbone network or the Internet; in particular, intermediate network 4420 may comprise two or more sub-networks (not shown).

The communication system of FIG. 20 as a whole enables connectivity between the connected UEs 4491, 4492 and host computer 4430. The connectivity may be described as an over-the-top (OTT) connection 4450. Host computer 4430 and the connected UEs 4491, 4492 are configured to communicate data and/or signaling via OTT connection 4450, using access network 4411, core network 4414, any intermediate network 4420 and possible further infrastructure (not shown) as intermediaries. OTT connection 4450 may be transparent in the sense that the participating communication devices through which OTT connection 4450 passes are unaware of routing of uplink and downlink communications. For example, base station 4412 may not or need not be informed about the past routing of an incoming downlink communication with data originating from host computer 4430 to be forwarded (e.g., handed over) to a connected UE 4491. Similarly, base station 4412 need not be aware of the future routing of an outgoing uplink communication originating from the UE 4491 towards the host computer 4430.

FIG. 21 illustrates a host computer communicating via a base station with a user equipment over a partially wireless connection in accordance with some embodiments.

Example implementations, in accordance with an embodiment, of the UE, base station and host computer discussed in the preceding paragraphs will now be described with reference to FIG. 21 . In communication system 4500, host computer 4510 comprises hardware 4515 including communication interface 4516 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of communication system 4500. Host computer 4510 further comprises processing circuitry 4518, which may have storage and/or processing capabilities. In particular, processing circuitry 4518 may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. Host computer 4510 further comprises software 4511, which is stored in or accessible by host computer 4510 and executable by processing circuitry 4518. Software 4511 includes host application 4512. Host application 4512 may be operable to provide a service to a remote user, such as UE 4530 connecting via OTT connection 4550 terminating at UE 4530 and host computer 4510. In providing the service to the remote user, host application 4512 may provide user data which is transmitted using OTT connection 4550.

Communication system 4500 further includes base station 4520 provided in a telecommunication system and comprising hardware 4525 enabling it to communicate with host computer 4510 and with UE 4530. Hardware 4525 may include communication interface 4526 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of communication system 4500, as well as radio interface 4527 for setting up and maintaining at least wireless connection 4570 with UE 4530 located in a coverage area (not shown in FIG. 21 ) served by base station 4520. Communication interface 4526 may be configured to facilitate connection 4560 to host computer 4510. Connection 4560 may be direct or it may pass through a core network (not shown in FIG. 21 ) of the telecommunication system and/or through one or more intermediate networks outside the telecommunication system. In the embodiment shown, hardware 4525 of base station 4520 further includes processing circuitry 4528, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. Base station 4520 further has software 4521 stored internally or accessible via an external connection.

Communication system 4500 further includes UE 4530 already referred to. Its hardware 4535 may include radio interface 4537 configured to set up and maintain wireless connection 4570 with a base station serving a coverage area in which UE 4530 is currently located. Hardware 4535 of UE 4530 further includes processing circuitry 4538, which may comprise one or more programmable processors, application-specific integrated circuits, field programmable gate arrays or combinations of these (not shown) adapted to execute instructions. UE 4530 further comprises software 4531, which is stored in or accessible by UE 4530 and executable by processing circuitry 4538. Software 4531 includes client application 4532. Client application 4532 may be operable to provide a service to a human or non-human user via UE 4530, with the support of host computer 4510. In host computer 4510, an executing host application 4512 may communicate with the executing client application 4532 via OTT connection 4550 terminating at UE 4530 and host computer 4510. In providing the service to the user, client application 4532 may receive request data from host application 4512 and provide user data in response to the request data. OTT connection 4550 may transfer both the request data and the user data. Client application 4532 may interact with the user to generate the user data that it provides.

It is noted that host computer 4510, base station 4520 and UE 4530 illustrated in FIG. 21 may be similar or identical to host computer 4430, one of base stations 4412 a, 4412 b, 4412 c and one of UEs 4491, 4492 of FIG. 20 , respectively. This is to say, the inner workings of these entities may be as shown in FIG. 21 and independently, the surrounding network topology may be that of FIG. 20 .

In FIG. 21 , OTT connection 4550 has been drawn abstractly to illustrate the communication between host computer 4510 and UE 4530 via base station 4520, without explicit reference to any intermediary devices and the precise routing of messages via these devices. Network infrastructure may determine the routing, which it may be configured to hide from UE 4530 or from the service provider operating host computer 4510, or both. While OTT connection 4550 is active, the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network).

Wireless connection 4570 between UE 4530 and base station 4520 is in accordance with the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments may improve the performance of OTT services provided to UE 4530 using OTT connection 4550, in which wireless connection 4570 forms the last segment. More precisely, the teachings of these embodiments may improve the random access speed and/or reduce random access failure rates and thereby provide benefits such as faster and/or more reliable random access.

A measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring OTT connection 4550 between host computer 4510 and UE 4530, in response to variations in the measurement results. The measurement procedure and/or the network functionality for reconfiguring OTT connection 4550 may be implemented in software 4511 and hardware 4515 of host computer 4510 or in software 4531 and hardware 4535 of UE 4530, or both. In embodiments, sensors (not shown) may be deployed in or in association with communication devices through which OTT connection 4550 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 4511, 4531 may compute or estimate the monitored quantities. The reconfiguring of OTT connection 4550 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect base station 4520, and it may be unknown or imperceptible to base station 4520. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signaling facilitating host computer 4510's measurements of throughput, propagation times, latency and the like. The measurements may be implemented in that software 4511 and 4531 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using OTT connection 4550 while it monitors propagation times, errors etc.

FIG. 22 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments.

FIG. 22 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19 and 20 . For simplicity of the present disclosure, only drawing references to FIG. 22 will be included in this section. In step 4610, the host computer provides user data. In substep 4611 (which may be optional) of step 4610, the host computer provides the user data by executing a host application. In step 4620, the host computer initiates a transmission carrying the user data to the UE. In step 4630 (which may be optional), the base station transmits to the UE the user data which was carried in the transmission that the host computer initiated, in accordance with the teachings of the embodiments described throughout this disclosure. In step 4640 (which may also be optional), the UE executes a client application associated with the host application executed by the host computer.

FIG. 23 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments.

FIG. 23 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19 and 20 . For simplicity of the present disclosure, only drawing references to FIG. 23 will be included in this section. In step 4710 of the method, the host computer provides user data. In an optional substep (not shown) the host computer provides the user data by executing a host application. In step 4720, the host computer initiates a transmission carrying the user data to the UE. The transmission may pass via the base station, in accordance with the teachings of the embodiments described throughout this disclosure. In step 4730 (which may be optional), the UE receives the user data carried in the transmission.

FIG. 24 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments

FIG. 24 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19 and 20 . For simplicity of the present disclosure, only drawing references to FIG. 24 will be included in this section. In step 4810 (which may be optional), the UE receives input data provided by the host computer. Additionally or alternatively, in step 4820, the UE provides user data. In substep 4821 (which may be optional) of step 4820, the UE provides the user data by executing a client application. In substep 4811 (which may be optional) of step 4810, the UE executes a client application which provides the user data in reaction to the received input data provided by the host computer. In providing the user data, the executed client application may further consider user input received from the user. Regardless of the specific manner in which the user data was provided, the UE initiates, in substep 4830 (which may be optional), transmission of the user data to the host computer. In step 4840 of the method, the host computer receives the user data transmitted from the UE, in accordance with the teachings of the embodiments described throughout this disclosure.

FIG. 25 illustrates methods implemented in a communication system including a host computer, a base station and a user equipment in accordance with some embodiments

FIG. 25 is a flowchart illustrating a method implemented in a communication system, in accordance with one embodiment. The communication system includes a host computer, a base station and a UE which may be those described with reference to FIGS. 19 and 20 . For simplicity of the present disclosure, only drawing references to Figure will be included in this section. In step 4910 (which may be optional), in accordance with the teachings of the embodiments described throughout this disclosure, the base station receives user data from the UE. In step 4920 (which may be optional), the base station initiates transmission of the received user data to the host computer. In step 4930 (which may be optional), the host computer receives the user data carried in the transmission initiated by the base station.

Any appropriate steps, methods, features, functions, or benefits disclosed herein may be performed through one or more functional units or modules of one or more virtual apparatuses. Each virtual apparatus may comprise a number of these functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessor or microcontrollers, as well as other digital hardware, which may include digital signal processors (DSPs), special-purpose digital logic, and the like. The processing circuitry may be configured to execute program code stored in memory, which may include one or several types of memory such as read-only memory (ROM), random-access memory (RAM), cache memory, flash memory devices, optical storage devices, etc. Program code stored in memory includes program instructions for executing one or more telecommunications and/or data communications protocols as well as instructions for carrying out one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause the respective functional unit to perform corresponding functions according one or more embodiments of the present disclosure.

The term unit may have conventional meaning in the field of electronics, electrical devices and/or electronic devices and may include, for example, electrical and/or electronic circuitry, devices, modules, processors, memories, logic solid state and/or discrete devices, computer programs or instructions for carrying out respective tasks, procedures, computations, outputs, and/or displaying functions, and so on, as such as those that are described herein.

Abbreviations

At least some of the following abbreviations may be used in this disclosure. If there is an inconsistency between abbreviations, preference should be given to how it is used above. If listed multiple times below, the first listing should be preferred over any subsequent listing(s).

-   -   1×RTT CDMA2000 1×Radio Transmission Technology     -   3GPP 3rd Generation Partnership Project     -   5th Generation     -   ABS Almost Blank Subframe     -   ARQ Automatic Repeat Request     -   AWGN Additive White Gaussian Noise     -   BCCH Broadcast Control Channel     -   BCH Broadcast Channel     -   CA Carrier Aggregation     -   CC Carrier Component     -   CCCH SDU Common Control Channel SDU     -   CDMA Code Division Multiplexing Access     -   CGI Cell Global Identifier     -   CIR Channel Impulse Response     -   CP Cyclic Prefix     -   CPICH Common Pilot Channel     -   CPICH Ec/No CPICH Received energy per chip divided by the power         density in the band     -   CQI Channel Quality information     -   C-RNTI Cell RNTI     -   CSI Channel State Information     -   DCCH Dedicated Control Channel     -   DL Downlink     -   DM Demodulation     -   DMRS Demodulation Reference Signal     -   DRX Discontinuous Reception     -   DTX Discontinuous Transmission     -   DTCH Dedicated Traffic Channel     -   DUT Device Under Test     -   E-CID Enhanced Cell-ID (positioning method)     -   E-SMLC Evolved-Serving Mobile Location Centre     -   ECGI Evolved CGI     -   eNB E-UTRAN NodeB     -   ePDCCH enhanced Physical Downlink Control Channel     -   E-SMLC evolved Serving Mobile Location Center     -   E-UTRA Evolved UTRA     -   E-UTRAN Evolved UTRAN     -   FDD Frequency Division Duplex     -   FFS For Further Study     -   GERAN GSM EDGE Radio Access Network     -   gNB Base station in NR     -   GNSS Global Navigation Satellite System     -   GSM Global System for Mobile communication     -   HARQ Hybrid Automatic Repeat Request     -   HO Handover     -   HSPA High Speed Packet Access     -   HRPD High Rate Packet Data     -   LOS Line of Sight     -   LPP LTE Positioning Protocol     -   LTE Long-Term Evolution     -   MAC Medium Access Control     -   MBMS Multimedia Broadcast Multicast Services     -   MBSFN Multimedia Broadcast multicast service Single Frequency         Network     -   MBSFN ABS MBSFN Almost Blank Subframe     -   MDT Minimization of Drive Tests     -   MIB Master Information Block     -   MME Mobility Management Entity     -   MSC Mobile Switching Center     -   NPDCCH Narrowband Physical Downlink Control Channel     -   NR New Radio     -   OCNG OFDMA Channel Noise Generator     -   OFDM Orthogonal Frequency Division Multiplexing     -   OFDMA Orthogonal Frequency Division Multiple Access     -   OSS Operations Support System     -   OTDOA Observed Time Difference of Arrival     -   O&M Operation and Maintenance     -   PBCH Physical Broadcast Channel     -   P-CCPCH Primary Common Control Physical Channel     -   PCell Primary Cell     -   PCFICH Physical Control Format Indicator Channel     -   PDCCH Physical Downlink Control Channel     -   PDP Profile Delay Profile     -   PDSCH Physical Downlink Shared Channel     -   PGW Packet Gateway     -   PHICH Physical Hybrid-ARQ Indicator Channel     -   PLMN Public Land Mobile Network     -   PMI Precoder Matrix Indicator     -   PRACH Physical Random Access Channel     -   PRS Positioning Reference Signal     -   PSS Primary Synchronization Signal     -   PUCCH Physical Uplink Control Channel     -   PUSCH Physical Uplink Shared Channel     -   RACH Random Access Channel     -   QAM Quadrature Amplitude Modulation     -   RAN Radio Access Network     -   RAT Radio Access Technology     -   RLM Radio Link Management     -   RNC Radio Network Controller     -   RNTI Radio Network Temporary Identifier     -   RRC Radio Resource Control     -   RRM Radio Resource Management     -   RS Reference Signal     -   RSCP Received Signal Code Power     -   RSRP Reference Symbol Received Power OR Reference Signal         Received Power     -   RSRQ Reference Signal Received Quality OR Reference Symbol         Received Quality     -   RSSI Received Signal Strength Indicator     -   RSTD Reference Signal Time Difference     -   SCH Synchronization Channel     -   SCell Secondary Cell     -   SDU Service Data Unit     -   SFN System Frame Number     -   SGW Serving Gateway     -   SI System Information     -   SIB System Information Block     -   SNR Signal to Noise Ratio     -   SON Self Optimized Network     -   SS Synchronization Signal     -   SSS Secondary Synchronization Signal     -   TDD Time Division Duplex     -   TDOA Time Difference of Arrival     -   TOA Time of Arrival     -   TSS Tertiary Synchronization Signal     -   TTI Transmission Time Interval     -   UE User Equipment     -   UL Uplink     -   UMTS Universal Mobile Telecommunication System     -   USIM Universal Subscriber Identity Module     -   UTDOA Uplink Time Difference of Arrival     -   UTRA Universal Terrestrial Radio Access     -   UTRAN Universal Terrestrial Radio Access Network     -   WCDMA Wide CDMA     -   WLAN Wide Local Area Network

Further definitions and embodiments are discussed below.

In the above-description of various embodiments of present inventive concepts, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of present inventive concepts. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which present inventive concepts belong. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

When an element is referred to as being “connected”, “coupled”, “responsive”, or variants thereof to another element, it can be directly connected, coupled, or responsive to the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected”, “directly coupled”, “directly responsive”, or variants thereof to another element, there are no intervening elements present. Like numbers refer to like elements throughout. Furthermore, “coupled”, “connected”, “responsive”, or variants thereof as used herein may include wirelessly coupled, connected, or responsive. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Well-known functions or constructions may not be described in detail for brevity and/or clarity. The term “and/or” (abbreviated “/”) includes any and all combinations of one or more of the associated listed items.

It will be understood that although the terms first, second, third, etc. may be used herein to describe various elements/operations, these elements/operations should not be limited by these terms. These terms are only used to distinguish one element/operation from another element/operation. Thus a first element/operation in some embodiments could be termed a second element/operation in other embodiments without departing from the teachings of present inventive concepts. The same reference numerals or the same reference designators denote the same or similar elements throughout the specification.

As used herein, the terms “comprise”, “comprising”, “comprises”, “include”, “including”, “includes”, “have”, “has”, “having”, or variants thereof are open-ended, and include one or more stated features, integers, elements, steps, components or functions but does not preclude the presence or addition of one or more other features, integers, elements, steps, components, functions or groups thereof. Furthermore, as used herein, the common abbreviation “e.g.”, which derives from the Latin phrase “exempli gratia,” may be used to introduce or specify a general example or examples of a previously mentioned item, and is not intended to be limiting of such item. The common abbreviation “i.e.”, which derives from the Latin phrase “id est,” may be used to specify a particular item from a more general recitation.

Example embodiments are described herein with reference to block diagrams and/or flowchart illustrations of computer-implemented methods, apparatus (systems and/or devices) and/or computer program products. It is understood that a block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions that are performed by one or more computer circuits. These computer program instructions may be provided to a processor circuit of a general purpose computer circuit, special purpose computer circuit, and/or other programmable data processing circuit to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, transform and control transistors, values stored in memory locations, and other hardware components within such circuitry to implement the functions/acts specified in the block diagrams and/or flowchart block or blocks, and thereby create means (functionality) and/or structure for implementing the functions/acts specified in the block diagrams and/or flowchart block(s).

These computer program instructions may also be stored in a tangible computer-readable medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable medium produce an article of manufacture including instructions which implement the functions/acts specified in the block diagrams and/or flowchart block or blocks. Accordingly, embodiments of present inventive concepts may be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.) that runs on a processor such as a digital signal processor, which may collectively be referred to as “circuitry,” “a module” or variants thereof.

It should also be noted that in some alternate implementations, the functions/acts noted in the blocks may occur out of the order noted in the flowcharts. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Moreover, the functionality of a given block of the flowcharts and/or block diagrams may be separated into multiple blocks and/or the functionality of two or more blocks of the flowcharts and/or block diagrams may be at least partially integrated. Finally, other blocks may be added/inserted between the blocks that are illustrated, and/or blocks/operations may be omitted without departing from the scope of inventive concepts. Moreover, although some of the diagrams include arrows on communication paths to show a primary direction of communication, it is to be understood that communication may occur in the opposite direction to the depicted arrows.

Many variations and modifications can be made to the embodiments without substantially departing from the principles of the present inventive concepts. All such variations and modifications are intended to be included herein within the scope of present inventive concepts. Accordingly, the above disclosed subject matter is to be considered illustrative, and not restrictive, and the examples of embodiments are intended to cover all such modifications, enhancements, and other embodiments, which fall within the spirit and scope of present inventive concepts. Thus, to the maximum extent allowed by law, the scope of present inventive concepts are to be determined by the broadest permissible interpretation of the present disclosure including the examples of embodiments and their equivalents, and shall not be restricted or limited by the foregoing detailed description. 

1. A method performed by a configuration controller in a network node of a network, the method comprising: determining whether or not a configuration change in a service mesh data plane is needed based on at least one parameter; responsive to determining that the configuration change is needed, identifying a set of possible configuration changes; generating a configuration based on the set of possible configuration changes; and applying the configuration to the service mesh data plane.
 2. The method of claim 1 wherein determining whether or not the configuration change in the service mesh data plane is needed comprises: obtaining a measurement of the at least one parameter; for each parameter of the at least one parameter, determining whether or not the parameter is outside of a tolerance threshold for the parameter; and responsive to the at least one parameter being outside of the tolerance threshold, determining that the configuration change is needed.
 3. The method of claim 2 wherein the at least one parameter is latency, and wherein: obtaining the measurement of the at least one parameter comprises obtaining actual latency and associated expected latency; determining whether or not the parameter is outside of the tolerance threshold comprises determining whether or not the actual latency is less than or equal to the associated expected latency.
 4. The method of claim 3 wherein the configuration change is for at least one shared request chain, the at least one shared request chain being a communication path formed by a set of sequential requests going through a set of shared proxies.
 5. The method of claim 4 wherein: identifying the set of possible configuration changes comprises identifying a set of shared request chains; generating the configuration based on the set of possible configuration changes comprises: generating an optimized configuration for the set of shared request chains; and generating a configuration for proxies that are part of the set of shared request chains; and applying the configuration to the service mesh data plane comprises applying changes to the set of shared request chains.
 6. The method of claim 4, wherein generating the configuration based on the set of possible configuration changes comprises: searching for a possible configuration from the set of possible configuration changes such that an associated policy granularity level is maximized; responsive to finding the possible configuration: estimating a future latency overhead caused by application of the possible configuration; and determining whether the possible configuration causes non-fulfillment of a required latency; and responsive to determining the future latency estimated is one of below or equal to the required latency, triggering a proxy configuration generator to generate a configuration template.
 7. The method of claim 1, further comprising generating a configuration template and receiving a proxy configuration optimizer trigger.
 8. The method of claim 7, wherein generating the configuration template comprises: obtaining configuration policies related to a set of shared request chains; for each configuration policy of the configuration policies: identifying a required granularity level; responsive to the required granularity level being greater than a maximum granularity level, mapping the configuration policy to the maximum granularity level; identifying at least one proxy that can implement the configuration policy; for each proxy of the at least one proxy, generating policy configuration parameters based on a proxy type of the proxy; for the configuration policies, generating configuration templates per proxy based on a collection of the policy configuration parameters; and triggering a gradual configuration applier to apply the configuration based on the configuration templates.
 9. The method of claim 8, further comprising receiving a gradual configuration applier trigger and wherein applying the configuration comprises: mapping relations between the at least one proxy to proxies in a previous configuration; instantiating one or more proxies based on at least the configuration templates to create a new path; determining whether or not latency of the new path is less than or equal to a latency of a previous path; responsive to the latency of the new path being less than or equal to the latency of the previous path: in one or a set of proxies in the previous path, shift (1511) traffic towards the one or more proxies in the new path related to the one or the set of proxies in the previous path; and tearing down (1513) proxies in the previous path.
 10. The method of claim 9, wherein determining whether or not latency of the new path is less than or equal to the latency of the previous path comprises determining whether or not latency of the new path is less than or equal to the latency of the previous path based on mirroring a percentage of traffic going throughout at least one related previous proxy in the previous configuration.
 11. The method of claim 9, wherein determining whether or not latency of the new path is less than or equal to the latency of the previous path comprises determining whether or not latency of the new path is less than or equal to the latency of the previous path based on estimated latency of the new path.
 12. The method of claim 1, further comprising applying the configuration based on one or more configuration templates.
 13. A configuration controller in a network node, of a network, the configuration controller comprising: processing circuitry; and memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising: determining whether or not a configuration change in a service mesh data plane is needed based on at least one parameter; responsive to determining that the configuration change is needed, identifying a set of possible configuration changes; generating a configuration based on the set of possible configuration changes; and applying the configuration to the service mesh data plane.
 14. The configuration controller of claim 13 wherein in determining whether a configuration change in the service mesh data plane is needed, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising: obtaining a measurement of the at least one parameter; for each parameter of the at least one parameter, determining whether or not the parameter is outside of a tolerance threshold for the parameter; and responsive to the at least one parameter being outside of the tolerance threshold, determining that the configuration change is needed.
 15. The configuration controller of claim 14 wherein the at least one parameter is latency, and wherein: in obtaining the measurement of the at least one parameter, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising obtaining actual latency and associated expected latency, and in determining whether or not the parameter is outside of a tolerance threshold, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising determining whether or not the actual latency is less than or equal to the associated expected latency.
 16. The configuration controller of claim 15 wherein the configuration change is for at least one shared request chain, the at least one shared request chain being a communication path formed by a set of sequential requests going through a set of shared proxies.
 17. The configuration controller of claim 16 wherein in identifying the set of possible configuration changes, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising identifying a set of shared request chains; in generating the configuration based on the set of possible configuration changes, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising: generating an optimized configuration for the set of shared request chains; and generating a configuration for proxies that are part of the set of shared request chains; and in applying the configuration to the service mesh data plane, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising applying changes to the sets of shared request chains.
 18. The configuration controller of claim 16, wherein in generating the configuration based on the set of possible configuration changes, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising: searching for a possible configuration from the set of possible configuration changes that maximizes an associated policy granularity level; responsive to finding the possible configuration: estimating a future latency overhead caused by application of the possible configuration; and determining whether the possible configuration causes non-fulfillment of a required latency; and responsive to determining the future latency estimated is one of below or equal to a required latency, triggering a proxy configuration generator to generate a configuration template.
 19. (canceled)
 20. (canceled)
 21. (canceled)
 22. (canceled)
 23. (canceled)
 24. The configuration controller of claim 13, wherein in generating the configuration based on the set of possible configuration changes, the memory includes instructions that when executed by the processing circuitry causes the configuration controller to perform operations comprising generating a configuration template.
 25. (canceled)
 26. (canceled)
 27. (canceled)
 28. A non-transitory computer-readable storage medium including program code which, when executed by processing circuitry of a configuration controller causes the configuration controller to perform operations comprising: determining whether or not a configuration change in a service mesh data plane is needed based on at least one parameter; responsive to determining that the configuration change is needed, identifying a set of possible configuration changes; generating a configuration based on the set of possible configuration changes; and applying the configuration to the service mesh data plane. 